by Tilum Mon 17 Oct 2011 - 18:27
Hello,
Navigate to:
Admin Panel
General
Categories and Forums
Modify all forums concerned
Permissions
View the forum > Untick the boxs concerned (Guests etc)
Tick all of the groups you want to see the forums (Staff etc)
Do this for all forums.
Save & Complete
Note, you can not change the permissions of a category, only the forums contained in a category.
~ Tilum