multi category

[rutin]

I am trying to make multi category gallery, just realised that i made it wrong.
Now i need subcategories. How to do that ?
Can any 1 make basic thing for me, or give me url of tutorial for me to look at.

*Main category
+ (sub)2000
-(sub item) MAN
-(sub item)FEMALE

             + (sub)2001
                   -(sub item) MAN
                   -(sub item)FEMALE

*Main cetegory 1
+ (sub)2000
-(sub item) MAN
-(sub item)FEMALE

             + (sub)2001
                   -(sub item) MAN
                   -(sub item)FEMALE

I have managed to do :

*Main category
+ (sub)2000

I dont know how to make categories in this way. I need to add thiose subs
Can any1 help ?