f3218016_Element_IDs__Id_Description
[Ids & Syntax] {gCalMarkup _id/}categorySelectTemplate[.groupId] [Template] Yes [Id Description] 
A template used to create category select menus. This template is usually an element. If a corresponding element with a category id (++add link) exists, a copy of this template is inserted into it for every category found in the current group.
Element IDs
Id Description