function page_links()
 {
     $pagination = new M_Pagination();
     $pagination->Items($this->get_total());
     $pagination->limit($this->users_per_page);
     $pagination->parameterName = 'page_num';
     $pagination->target("admin.php?page=membershipmembers");
     $pagination->currentPage($this->page_num);
     $pagination->nextIcon('►');
     $pagination->prevIcon('◄');
     $pagination->items_title = __('members', 'cp');
     $pagination->show();
 }