To edit categories, including to enable/disable them, you will need to visit the "Manage Categories" link in the primary menu: Once there, you will see a category heirarchy tree in the left hand column. To expand a category in order to view the sub-categories, click the "+" just to the left of the category name as highlighted below: Select a category you want to edit by clicking on it. Once there, you will be able to edit the category's name, "Active" setting, and a host of other options: Note: turning the "Is Active" option to "No" will automatically un-publish it from the Categories menu on the front page.