How do you add categories to custom post types in WordPress?

Question

I'd like to be able to have categories of a custom post type, how do you set this up?

update

I want to keep the default categories for regular blog posts, but a separate set of categories just CPT.

Answer 1

You need to add 'taxonomies' => array('category') in your register_post_type() function.

Answer 2

• register_post_type()
• register_taxonomy()
• register_taxonomy_for_object_type()

Answer 3

You have to register a taxonomy using register_taxonomy or register_taxonomy_for_object_type. The you can use wp_insert_term to insert values for that taxonomy.