Przykładowa strona

    $args = array(
       'public'   => true,
       '_builtin' => false,
    );

    $output = 'names'; // names or objects, note names is the default
    $operator = 'and'; // 'and' or 'or'

    $post_types = get_post_types( $args, $output, $operator ); 

    foreach ( $post_types  as $post_type ) {

       echo '<p>' . $post_type . '</p>';
    }

    ?>