//chnage slug of a custom post type add_filter( 'register_post_type_args', 'comand_register_post_type_args', 10, 2 ); function comand_register_post_type_args( $args, $post_type ) { if ( 'command' === $post_type ) { $args['rewrite']['slug'] = 'comand'; } return $args; }