Please help us by providing the following info. Before posting please also check the pinned "Known issues" threads and make sure that you're running the latest available version for your oC release: https://owncloud.org/changelog/
Steps to reproduce
1. Navigate to Users admin page
2.
3.
Tell us what should happen
Groups list should be an alphabetical order
Tell us what happens instead
Groups are shown in creation order
Server configuration
Operating system: Ubuntu 14.10
Web server: Apache
Database: MySQL
PHP version: 5.5
ownCloud version 9.0.4
Updated from an older ownCloud or fresh install: Fresh Install