Imagine three countries:

germany
italy
spain

with some cities

on one page i want to show:

germany
all subcats

italy
all subcats

spain
all subcats


I have no problem to do this, but i do it with three globals like

...
all cats with fatherID = 'ID of cat italy
...


It is no big story, but maybe someday i want to have 50 countries, then it would be really nice to say in the template something like:

<%list_of_subcats(n)%>

while n is the FatherID.


I have no idea how to do this and hope for help.