Posting catergory and sub-category question? ... is there a widget?

I want to make sub-catergories like:

catergory: a
sub-catergories: a,b,c,d,e

catergory: b
sub-catergories: a,b,c,d,e

catergory: c
sub-catergories: a,b,c,d,e

And using the category widget have just the main categories a,b,c displayed. I've tried creating sub-catergories and placing them under the "Parent" catergory, but it's getting messed up. Am I going about this the right way or is their a widget?

Thanks

 

this might work for you
http://wordpress.org/extend/plugins/extended-categories-widget/

 

Great



Thanks