title: How to add a css class to a tab on product view page from xml?
body: <p>I am adding tabs from xml to product view page, but I want to apply separate css class on one of the tab.</p>
  
  <pre><code>&lt;action method="addTab" translate="title" module="catalog" &gt;                    
                      &lt;alias&gt;description_tabbed&lt;/alias&gt;                 
                      &lt;title&gt;My Tab&lt;/title&gt;             
                      &lt;block&gt;catalog/product_view_description&lt;/block&gt;                    
                      &lt;template&gt;catalog/product/view/description.phtml&lt;/template&gt;                
                  &lt;/action&gt;
  </code></pre>
  
  <p>How can I add class to it? I tried the following:</p>
  
  <pre><code>&lt;action method="addTab" translate="title" module="catalog" &gt;                    
                      &lt;alias&gt;description_tabbed&lt;/alias&gt;                 
                      &lt;liParams&gt;
              &lt;class&gt;myclassname&lt;/class&gt; 
              &lt;/liParams&gt;
                      &lt;title&gt;My Tab&lt;/title&gt;             
                      &lt;block&gt;catalog/product_view_description&lt;/block&gt;                    
                      &lt;template&gt;catalog/product/view/description.phtml&lt;/template&gt;                
                  &lt;/action&gt;
  </code></pre>