title: Select an element based on its html value in jQuery
body: <p>I have the following markup:
  <code>&lt;ul class="list"&gt;
      &lt;li&gt;4&lt;/li&gt;
      &lt;li&gt;5&lt;/li&gt;
      &lt;li&gt;6&lt;/li&gt;
  &lt;/ul&gt;</code></p>
  
  <p>How can I select the li items with the html value of 5 and 6 and add a class to them? </p>