Adding a 3rd and 4th stage layer on UDM3

hi i use UDM3 and i was wondering if there was a way to add a 3rd and 4th stage like what i pasted in the image below..

i know standard udm3 has the main menu then the sub cats then the 2nd stage levels.

but i was wondering if there was a way to add a 3rd and 4th in..




many thanks..