Apply styles from styles dropdown in Rich Text Editor(RTE)

Hi

      All my unordered list in the RTE should be rendered on page as follows

<ul class= "bullet">

<li>item1</li>

<li>item2 </li>

<ul>

      I have a styles dropdown in RTE. if i select my list and apply the style it will get renedered as follows

<ul>

<li><span class= "bullet" > item1</span> </li>

<li><span class= "bullet" > item2</span> </li>

</ul>

        But i want the former way to be rendered rather than the later. Please help me find a solution ASAP.

Thanks

Veena