echo '<br /><hr />[<a href="mchat/index.php?act=otv&id='.$res['user_id'].'">Отв</a>] [<a href="mchat/index.php?act=cyt&id='.$res['id'].'">Цит</a>]';и меняем на
echo '<br /><hr />[<a href="mchat/index.php?act=otv&id='.$res['user_id'].'">Отв</a>] [<a href="mchat/index.php?act=cyt&id='.$res['id'].'">Цит</a>]';echo !$user_id || $user_id == $User['id'] ? '<b>' . $User['name'] . '</b> ' : '<a href="' . $home . '/users/profile.php?user=' . $User['id'] . '&