Developer credits
Git commits in Moodle 2.6.x by Dmytro Vorona
commit 42b40f99c1d02a7da2b5f13b72948fb2eccf85d3 Author: Dmytro Vorona <alendit@gmail.com> Date: Mon, 25 Mar 2013 21:19:25 +0800 Tag: v2.6.0-beta MDL-40297 Hide empty categories in my courses
commit 257b59e737fb7aff09e63b756fe52a31b7892fc0 Author: Dmytro Vorona <alendit@gmail.com> Date: Mon, 25 Mar 2013 17:57:31 +0800 Tag: v2.6.0-beta MDL-38631 Fixed faulty add_category call, introduced in 758103