$res1 and $res

switch($act){


default:
echo'<div class="menu" style="text-align:center;"><a href="/forum.php?act=last_thread">Последние темы</a> | <a href="/forum.php?act=last_post">Последние сообщения</a></div>';
$total=mysql_num_rows(mysql_query("select * from `razdel`"));
if($total){
$sql=mysql_query("select * from `razdel` order by `id`");
while($res=mysql_fetch_assoc($sql)){
echo'<div class="menu"><b>'.$res['name'].'</b><br />';
$sql1=mysql_query("select * from `forum` where `razdel`='$res[id]'  ");
while($res1=mysql_fetch_assoc($sql1)){

echo'<a href="/forum.php?act=forum&id='.$res1['id'].'" style="margin:3%;text-align:center;">- '.$res1['name'].'</a><span style="float:right;">['.mysql_num_rows(mysql_query("SELECT id FROM `themes` WHERE `id_forum`='$res1[id]'")).'/'.mysql_num_rows(mysql_query("SELECT id FROM `posts` WHERE `id_forum`='$res1[id]'")).']</span><br />';
}
echo'</div>';
}
}else{echo'<div class="menu">Разделов еще нет</div>';}
if($user['level']>0)echo'<div class="menu"><a href="/index.php?mode=admin&fid=set_for" style="display:block;text-align:center;">Управление форумом</a></div>';
back('/');
}