How do we change paths to ray / orca and rename the folders ?

I was wondering if instead of having ray in the path,can it be possiable to have it say app instead of ray, I'll give it example

www yourdomain com / ray (original)

www yourdomain com / apps (after)

___________________________

www yourdomain com / orca (original)

www yourdomain com / forum (after)

Any help would be nice