Adding Categories to a WordPress Custom Post Type?

Question

Is it possible to add categories to a Custom Post Type in WordPress?

Answer 1

Put the following in your theme's functions.php file (changing my-custom-post-type to be whatever your Custom Post Type is, of course):

register_taxonomy_for_object_type('category','my-custom-post-type');

Answer 2

I found this link to be helpful with the full function call and hooks to target, it even mentions the distinction between if the custom post type was created by a plugin: http://pippinsplugins.com/add-already-registered-taxonomy/