title: How to prevent adding CSS 'class' properties
body: <p>I am using Ruby on Rails 3.0.9, jQuery 1.6.2 and jQuery UI. I am trying to implement nested tabs by following the <a href="http://jqueryui.com/demos/tabs/" rel="nofollow">official documentation</a>. </p>
  
  <p>When I state the following (that is the "normal"\"common" way as stated in the documentation source code)</p>
  
  <pre><code>&lt;div id="tabs"&gt;
    &lt;ul&gt;
      &lt;li&gt;...&lt;/li&gt;
    &lt;/ul&gt;
  &lt;/div&gt;
  
  &lt;script&gt;
    $(function() {
      $( "#tabs" ).tabs();
    });
  &lt;/script&gt;
  </code></pre>
  
  <p>and then I go to display the HTML code generated, jQuery UI automatically add the following CSS <code>class</code> properties to the <code>&lt;div id="tabs"&gt;</code>:</p>
  
  <pre><code>&lt;div class="ui-tabs ui-widget ui-widget-content ui-corner-all" id="tabs"&gt;
    ...
  &lt;/div&gt;
  </code></pre>
  
  <p><strong>Is it possible to prevent adding some of those CSS <code>classes</code>? If so, how to do that?</strong></p>