尝试设置rewrite 作为中的参数$args register_post_type 作用

示例：

function codex_custom_init() {
    $labels = array(
        \'name\' => _x(\'Books\', \'post type general name\'),
        \'singular_name\' => _x(\'Book\', \'post type singular name\'),
        \'add_new\' => _x(\'Add New\', \'book\'),
        \'add_new_item\' => __(\'Add New Book\'),
        \'edit_item\' => __(\'Edit Book\'),
        \'new_item\' => __(\'New Book\'),
        \'all_items\' => __(\'All Books\'),
        \'view_item\' => __(\'View Book\'),
        \'search_items\' => __(\'Search Books\'),
        \'not_found\' => __(\'No books found\'),
        \'not_found_in_trash\' => __(\'No books found in Trash\'),
        \'parent_item_colon\' => \'\',
        \'menu_name\' => __(\'Books\')
    );
    $args = array(
        \'labels\' => $labels,
        \'public\' => true,
        \'publicly_queryable\' => true,
        \'show_ui\' => true,
        \'show_in_menu\' => true,
        \'query_var\' => true,
        \'rewrite\' => array(\'slug\' => \'porfolio\'),
        \'capability_type\' => \'post\',
        \'has_archive\' => true,
        \'hierarchical\' => false,
        \'menu_position\' => null,
        \'supports\' => array(\'title\', \'editor\', \'author\', \'thumbnail\', \'excerpt\', \'comments\')
    );
    register_post_type(\'book\', $args);
}

add_action(\'init\', \'codex_custom_init\');