How to get sub-categories to show in more of a "list" with the description showing after each one?

[signal15]

Right now, in the personna theme, the subcategories show in a 2-column table, and the description disappears from them. How can I make subcategories just indented under the main category, and show the description after each one??

[signal15]

Is this possible with just a CSS change, or is it more than that. Because the description is disappearing when making a category into a sub-category, I'm thinking it's more than just CSS.