Форум

<?
$filter = Array
(
    "GROUPS_ID"           => Array(1)
);
$rsUsers = CUser::GetList(Array(), Array(), $filter); 

while($rsUsers->NavNext(true, "f_")) :
        $rsUser = CUser::GetByID($f_ID);
        $arUser = $rsUser->Fetch();
        echo "<pre>"; print_r($arUser); echo "</pre>";

endwhile;
?>