show category label on custom post type

add_filter( 'jnews_primary_category', 'get_cat_custom_post_type', 99, 2 );


function get_cat_custom_post_type( $category_id, $post_id ) {
    if ( null === $category_id ) {
        $categories = array_slice( get_the_category( $post_id ), 0, 1 );
        if ( empty( $categories ) ) {
            return null;
        }
        $category    = array_shift( $categories );
        $category_id = $category->term_id;
    }

    return $category_id;
}