Whenever I go to the "Admin->Add/edit courses" option I think: "why it shows me a category editor in first place, with the create course itself below. I "feel" it's a bit mixed.

So I'm writing this with the aim of finding a better approach of handling courses & categories.

What about to separate the add/edit forms from the navigation itself? I think that the correct way could be to show a list of categories (nested), with some buttons to create/edit/delete new categories or new courses but, in any case, without mixing the forms in the same window that the list.

Also I've thought about to use tabs to separate them but I haven't been able to find a good approach this way.

Just one quick thought. Ciao