Hide the create category button in the frontend

When logged in to the frontend, if you have set up a DOCman Tree List or Hierarchical List menu item, and your user has 'create' permissions by default DOCman will allow your users to add documents and categories. 

If you want to allow these users to add documents but deny them from adding categories, you will need to edit the menu item setting for Allow adding new categories and set it to No.

Now, when your  users log into the frontend of your website the Add category button will be hidden from view.