tag category

Im interessted in a script that enable admins to define groups or categories for tags. example: Color: Bed, Blue, Breen Cars : Renault, Mercedes, Ford User can select a category, and then a tag. Threads should display those tags ordered by their categories. example: Cars: Ford Color: red I...

Suggestion: exactly the same as we already have for "Prefixes" with the ability of creating "Prefix Groups", please provide the ability to create "Tag Groups". :)