Extension:MsCatSelect

MsCatSelect adds a visual interface to the edit page that allows you to:
 * Add a category to a page by selecting the category in a drop-down on the edit page.
 * Remove categories from a page.
 * Define a custom list of categories.
 * Set a specific sortkey for each category.
 * Create a new subcategory in a selected category.

Furthermore:
 * If you select a category in the drop-down list another drop-down will be created with all subcategories
 * The selected categories are received through the mediawiki API
 * User-friendly select boxes with Chosen

$wgMSCS_WarnNoCategories
Defines if you want to get warned if there is no category defined for this page. True by default.

$wgMSCS_MainCategories
Is an array filled with categories which should be loaded in the first drop-down. If this array is nonexistent all main categories (categories which are not a subcategory) of the wiki are loaded automatically. Null by default.