When you list categories in WordPress they are looped via an array using a standard manner like this:

             <ul>
               <li>catgory1</li>
             </ul>

In fact, the class in question is <ul class="post-categories"> can anyone think of a way to remove these and make them display horizontally so that they are like this:

apples, pears, bananas, peaches etc?

One solution is to mess about with the core files but that's never a good idea right?