Having 2 separate buildings menus (like Age of Empires 2)

[I-am-murloc]

In my map I want my builder to have 2 separate building menus. It's alot easier to understand what I meen if you have played age of empires 2. There the villager has one building menu for military buildings and one for other buildings and I want it to be exactly like that. Would appreciate if you could help me.

 

[Archangel_Tidusx]

I'm pretty sure this is on this board somewhere. It's hard to do and it doesn't exactly work like the first build menu.