ISKB:How to Create a new Category
From Test wiki
To create a new category you need only reference the new category in an article by adding [[Category: NewCategoryName]] somewhere on the page.
To create a new category for the IS Knowledge base, you need to make sure that the category you create is a sub category of the ISKB category. Do this by clicking on the category name once you've saved your article and adding [[Category: ISKB]] into the page text for your new category. You might also choose to add some text explaining what the category is about as well. To further control the category structure, you might choose to reference a different category that is already a sub category of ISKB.