public function add_hook()
{
if (get_option('permalink_structure') != '') {
add_filter('getarchives_join', array($this, 'getarchives_join'), 10, 2);
// [steve]
add_filter('getarchives_where', array($this, 'getarchives_where'), 10, 2);
add_filter('get_archives_link', array($this, 'get_archives_link'), 20, 1);
}
}