Posts and custom post types in same category

gistfile1.txt

La register_post_type trebuie adaugat :
  'taxonomies' => array('category')
  
Ex:
add_action( 'init', 'trustedtherapist_create_post_type' );
function trustedtherapist_create_post_type() {
	register_post_type( 'case',
		array(
			'labels' => array(
				'name' => __( 'Cases' ),
				'singular_name' => __( 'Cases' )
			),
			'public' => true,
			'has_archive' => true,
			//for tags
			'taxonomies' => array('category'),
			//for the featured image
			'supports' => array( 'title', 'editor', 'thumbnail', 'revisions' ),
				'show_ui' => true,
		)
	);
	flush_rewrite_rules();
}