5
without turning the page into a module itself and giving each admin group access to that module you can't..
the other way would require more hacking and editing to possibly retrieve what group the user is in 1st and then if he/she in 1 group they get that menu, if not they get the other..
the other way would be to create a 2nd isAdmin function ie $xoops_isAdmin2 which i did manage to do a while back when i was modifying 2.0.7.3, but that requires a lot more hacking of the core..
i can't think of any other ways of doing that without actually turning the pages u want to access into a XOOPS module..