I am building a FAQ section in our mobile site which I would like to have the following hierarchy:

Category > Sub-category > Sub-sub-category > Article

I would like the category list and each sub-category list to display on its own separate page, rather than use an accordion-style UI (which you find in most FAQ plug-ins).

I'm told by my developer that we can only display Category > Sub-category on separate pages in WP, but not Sub-sub-category.

I would like to know if it's possible to do what I've described in WP so that I can ask my developer to do some more research. If you are also able to explain how we should go about this, that would be a great help!