title: Jquery: append first li child to the end of the list
body: <pre><code>&lt;ul&gt;
  &lt;li&gt;first children&lt;/li&gt;
  &lt;li&gt;second children&lt;/li&gt;
  &lt;li&gt;third children&lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p>How can I use Jquery to remove first children and append it to end of ul list?</p>