Extension:CategoryTagSorter

The CategoryTagSorter extension alphabetizes category links at the bottom of an article.

Description
A MediaWiki article typically displays the list of category links in the order in which they appear in the article. For articles with many categories, it can be difficult for readers to find the category they're looking for. This extension simply alphabetizes those category links. The sorting is ascii-betical, which usually works out OK as most wikis are configured to have the first letter of a title be uppercase (see $wgCapitalLinks.)

This extension adds a user preference for those users who prefer MediaWiki's default behavior (and who enjoy searching aimlessly through lists of categories).

Configuration parameters
None! Short &amp; simple.

However, here is a user-preference installed under the Appearance section which allows users to turn off the alphabetizing of the categories.