build_category_yahoo may be the closest available option, which implements yahoo style related categories. You can see the option under Setup > Build Options.
It prefixes categories with an @ sign and when clicked takes you to the related category.
As far as I know, there is nothing as standard to do what you desire. You can copy links into multiple categories but you can't copy categories into other categories. Alex may be able to shed more light.
It prefixes categories with an @ sign and when clicked takes you to the related category.
As far as I know, there is nothing as standard to do what you desire. You can copy links into multiple categories but you can't copy categories into other categories. Alex may be able to shed more light.