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Enclose whole div in an <a>

I have a div which I want to surround with an <a href>. I have the jQuery to add the <a href> after the div but I struggle to set it before and close it after the div.
This is the jQuery code I have:
$('.box_service').each(function() {
var link = $(this).html();
$(this).contents().wrap('');
});
It results in this HTML:
<div class="row">
<div class="box_service">
<a href="example.com">
<div class="inner-row"></div>
</a>
</div>
</div>
However my goal is this structure:
<div class="row">
<a href="example.com">
<div class="box_service">
<div class="inner-row"></div>
</div>
</a>
</div>
I can't enter the div before because there are more boxes in this row so I would add the <a href> to everything in there

The issue is due to your call to contents() which means you're wrapping the elements inside .box_service, not that element itself. Remove that method call.
Also note that each() is redundant, you can do what you require in a single line:
$('.box_service').wrap('');
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="row">
<div class="box_service">
Box service #1
<div class="inner-row">Inner row #1</div>
</div>
</div>
<div class="row">
<div class="box_service">
Box service #2
<div class="inner-row">Inner row #2</div>
</div>
</div>

.content will wrap the contents of your div, you want to wrap the div with <a> so call wrap on the div not on contents.
$('.box_service').each(function() {
var link = $(this).html();
$(this).wrap('');
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="row">
<div class="box_service">
<div class="inner-row"></div>
</div>
</div>

$('.box_service').each(function() {
var link = $(this).html();
$(this).wrap('');
});
You just need to remove contents() in between $(this).wrap() because contents() mean that you are wrapping the children of $(this).

Remove .contents() in order to wrap around each element with the class box-service:
$('.box_service').each(function() {
$(this).wrap('');
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="row">
<div class="box_service">
<a href="example.com">
<div class="inner-row"></div>
</a>
</div>
</div>

$('.box_service').wrap('');

On click, find next element by class name

I have a mobile menu, and when the user clicks the span with the class of "open", the next footer-menu-accordion opens. However, it also opens when the user clicks on the anchor link "level-1" Men.
What I am trying to do right now, is when the user clicks Men I would like to use jquery to find the NEXT footer-menu-accordion and keep it as display:none (which is the parent div containing the level-2 anchor tags). I know I have to use jquery's next() or find() methods, but I'm not sure how to do it. Can anyone help me out?
function mobileMainNav() {
$('a.level-1.direct').click(function(e) {
window.location = $(this).attr('href');
});
}
mobileMainNav();
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="mobile-menu" class=" footer-menu-accordion ">
<div class="dropdown-container ">
<a class="level-1 direct">Men</a>
<span class="open">img</span>
</div>
<div class="footer-menu-accordion ">
<a class="level-2 "></a>
<ul></ul>
<a class="level-2 "></a>
<ul></ul>
<a class="level-2 "></a>
<ul></ul>
</div>
</div>
I wrote this so when I click on level-1, I am directed to the "mens" section of my website. This works fine, however when I clicik level-1 I do not want the next dropdown to open, which it currently does. So I know I need to add some more jquery into this function to do so, I'm just not sure how as I am new to jQuery. Thank you in advance!

I'm not sure if you want to get the nearest footer for your anchor tag with the class level-1 or not ... if so try this :
function mobileMainNav() {
$('a.level-1').click(function(e) {
var nearestFooter = $(this).parent().siblings('div.footer-menu-accordion');
console.log(nearestFooter[0]);
});
}
mobileMainNav();
<div id="mobile-menu" class="footer-menu-accordion">
<div class="dropdown-container">
<a class="level-1">Men</a>
<span class="open">img</span>
</div>
<div class="footer-menu-accordion">
<a class="level-2"></a>
<ul></ul>
<a class="level-2"></a>
<ul></ul>
<a class="level-2"></a>
<ul></ul>
</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
also you don't have element with the class (.direct)

How to show a specific div when a link is clicked and hide others?

I want to show only one div when the user clicks the links on the icon bar and hide others. When the user clicks home link of the icon bar only 'hoediv'is visible and others hidden.
My work is below please help!!
<!doctype HTML>
<head>
<div class="main-header-div">
<a id="home" href="" > Home</a>
<a id="about" href=""> About us</a>
</div>
</head>
<body>
<script>
$(function(){
$("#home").click(function(){
$("#homediv").show();
$("#aboutus").hide();
return false;
});
});
</script>
<div id="homediv" style="color:white; background-color:red;height:89px;
width:100%;font-size:150%; display:none;">This is my site.
</div>
<div id="aboutus" style="display:none;">
this is about us page
</div>
</body>
</html>

What you need to fix?
Firstly, <head></head> only includes metadata, the rest should be in the <body></body>.
If you're not going to make use <a> anchor tags for hyperlinking, then pass the value href="JavaScript:Void(0);" (The void operator evaluates the given expression and then returns undefined) or better yet, don't use anchor tags better yet span or button.
You didn't import jquery.js in your html file.
You can make this a lot more effecient, but I'd suggest you learn some basic html from the widely available sources and then CSS, Jquery,etc.
Sources to refer:
https://www.w3schools.com/html/html5_intro.asp
https://www.w3schools.com/css/default.asp
https://www.w3schools.com/jquery/default.asp
$(function() {
$("#home").click(function() {
$("#homediv").show();
$("#aboutus").hide();
});
$("#about").click(function() {
$("#homediv").hide();
$("#aboutus").show();
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="main-header-div">
<a id="home" href="JavaScript:Void(0);"> Home</a>
<a id="about" href="JavaScript:Void(0);"> About us</a>
</div>
<div id="homediv" style="color:white; background-color:red;height:89px;
width:100%;font-size:150%; display:none;">This is my site.
</div>
<div id="aboutus" style="display:none;">
this is about us page
</div>

If you want to simplify it, you can use classes and data attributes to toggle wanted content:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="main-header-div">
<a class="header-link" id="home" data-toggle="homediv" href="#" > Home</a>
<a class="header-link" id="about" data-toggle="aboutus" href="#"> About us</a>
</div>
<div class="content" id="homediv" style="color:white; background-color:red;height:89px;
width:100%;font-size:150%; display:none;">
This is my site.
</div>
<div class="content" id="aboutus" style="display:none;">
this is about us page
</div>
<script>
$(document).ready(function() {
$(".header-link").click(function(){
$(".content").hide();
$("#" + $(this).attr("data-toggle")).show();
});
});
</script>

<a> element not working properly when hiding parent?

I made this script, and despite one oddity, it works fine. It's hiding/showing the parent of div element with a class containing specific content. The problem when I press my <a> elements, that act as buttons, they "filter" the divs, but it leaves the first comment <a>? If I change the element do a <div> instead no problem, but with an <a> element it behaves weirdly? Is this just a bug or?
here is a JSFiddle: https://jsfiddle.net/g1puxhs7/2/
HTML:
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js">
</script>
<a class='viewBtn'>Published<a>
<a class='viewBtn'>Completed<a>
<a class='viewBtn'>Created<a>
<div class="orders" id="orders">
<div class="row">
<div class="status">
Completed
</div>
<a>Comment</a>
</div>
<div class="row">
<div class="status">
Completed
</div>
<a>Comment</a>
</div>
<div class="row">
<div class="status">
Completed
</div>
<a>Comment</a>
</div>
</div>
<style>
.row {
width: 200px;
margin: 10px;
background: #ccc;
padding: 4px;
}
</style>
SCRIPT:
//--Filter by Status--//
$('.viewBtn').click(function() {
var txt = $(this).text();
$('.status:contains("' + txt + '")').parent().toggle();
$(this).toggleClass('down');
});

The problem is with your links:
<a class='viewBtn'>Published<a>
<a class='viewBtn'>Completed<a>
<a class='viewBtn'>Created<a>
You have 6 opening a tags, instead of 3 opening and 3 closing tags.
This is why the browser adds closing a tags in your script in a bunch of places, one of them in your first div—and then your whole DOM tree looks different than what you want.

Your markup needed to be cleaned up. Here is your markup cleaned up. Also, i find it best to add href for you anchor tags, and then you can comment them out with #, or you can add javascript:void(0). If you use the # approach, in your JS, you can add e.preventDefault();
HTML Cleaned:
<div>
<a class='viewBtn' href="#">Published</a>
<a class='viewBtn' href="#">Completed</a>
<a class='viewBtn' href="#">Created</a>
</div>
<div class="orders" id="orders">
<div class="row">
<div class="status">
Completed
</div>
<a class="stuff" onclick="Comment">Comment</a>
</div>
<div class="row">
<div class="status">
Completed
</div>
<a class="stuff">Comment</a>
</div>
<div class="row">
<div class="status">
Completed
</div>
<a class="stuff">Comment</a>
</div>
</div>
JS with preventDefault():
$('.viewBtn').click(function(e) {
e.preventDefault();
var txt = $(this).text();
$('.status:contains("' + txt + '")').parent().toggle();
$(this).toggleClass('down');
});

Switch Content of Div onclick

I've got two divs - each with one image inside. If I click on the image inside the second div I want this image to become the content of the first div (like a gallery).
It's important that I don't replace the links inside the img tag, so document.IMG1name.src=document.IMG2name.src isn't a possibility.
I tried it with innerhtml, but it doesnt work:
<div id="container1">
<img src="blablabla">
</div>
<div id="container2"; onclick="document.getElementById('container1').innerHTML=document.getElementById('container2').innerHTML"><img src="../funnycat.jpg">
</div>

mm... your code works fine, just close img tags and remove semicolon:
<div id="container1">
<img src="blablabla" />
</div>
<div id="container2" onclick="document.getElementById('container1').innerHTML=document.getElementById('container2').innerHTML"><img src="https://www.google.es/logos/doodles/2013/holiday-series-2013-3-4504416610680832-hp.jpg" />
</div>
here you have a demo: http://jsfiddle.net/HLs86/

HTML
<div class="pricing_table" id="monthly">
<ul>
<li>Basic</li>
<li>Subscribe Now</li>
</ul>
<ul style="background-color:#CCCCCC;">
<h2>Monthly Plans</h2><a class='plansSwitch' href='#yearly'>Click here to switch to the "Yearly Plans"</a></ul>
</div>
<div class="pricing_table" id="yearly">
<ul>
<li>Basic</li>
<li>Subscribe Now</li>
</ul>
<ul style="background-color:#CCCCCC;">
<h2>Yearly Plans</h2><a class='plansSwitch' href='#monthly'>Click here to switch to the "Monthly Plans"</a></ul>
</div>
JS
var $plansHolders = $('#monthly, #yearly').hide();
$('#monthly').show();
$('.plansSwitch').click(function() {
var href = $(this).attr('href');
$plansHolders.hide();
$(href).show();
});

you just need to add javascript: on your onclick action like this
<div id="container1"></div>
<div id="container2" onclick="javascript:document.getElementById('container1').innerHTML=document.getElementById('container2').innerHTML"><img src="http://i.imgur.com/0fS8dCsb.jpg"/>
</div>
there is example