How to Display Subcategories Horizontal?

I'm using the latest 3.x version and when I click on a main category, the subcategories display in a vertical list of text links. In version 4.x, these subcategories show as horizontal text links. How would I duplicate this 4.x behavior in 3.x?

Here's a link to the 4.x demo that shows subcategories arranged horizontally:


You need to add the CSS rule:-

.subcategories ul li {
display: inline-block;

You'll probably find in V3 the same CSS class uses “display: block;”

There are numerous guides and walkthroughs in the docs, on the forum, via Google, etc, on how to override styles by using my_addons.