How to customize HTML output for category list?

I’m using wp_list_categories to display a list of categories in my sidebar. I’ve changed the title_li parameter to an <h2> heading to match my site’s other widget titles.

This is the HTML output as it is currently formatted:

<div class="text-widget">
      
       <li>	
         
       <h2 class="widget-title">Category List Title</h2>
	   
           <ul>
	        <li>category 1</li>
	        <li>category 2</li>
	   </ul>
      
       </li>

</div>

I would like to change it to the following structure:

<div class="text-widget">
      
       <h2 class="widget-title">Category List Title</h2>
	   
           <ul>
	        <li>category 1</li>
	        <li>category 2</li>
	   </ul>
           
</div>