title: Add a surrounding div with jQuery?
body: <p>Bit tricky to communicate but hope this makes sense.</p>
  
  <p>I have 8 div containers and need to wrap all the even numbers with an extra div using Jquery, the desired effect like so,</p>
  
  <pre><code>&lt;div id="wrapper"&gt;
    &lt;div id="content"&gt;
      &lt;/div&gt;&lt;/div&gt;
  
    &lt;div id="content"&gt;
      &lt;/div&gt;
  
  &lt;div id="wrapper"&gt;
    &lt;div id="content"&gt;
      &lt;/div&gt;&lt;/div&gt;
  </code></pre>