In this screencast, Tom Johnson of Id Rather be Writing explains how to style category levels in WordPress so that each category level (parent, child, sub-child) will have a distinct style. You style the categories by adding specific classes to your stylesheet.
These are the classes that you will be using:
- .cat-item a (top level, or all levels if no other classes are used)
- .cat-item ul li a (child level)
- .cat-item ul ul li a (sub-child level)