MoD,
foreach ($_GET as $check_url) {
$help = mysql_fetch_assoc(mysql_query("SELECT * FROM `putevoditel` WHERE `str_url` = '".$check_url."' "));
$off_on = mysql_fetch_assoc(mysql_query("SELECT * FROM `putevoditel_us` WHERE `id_url` = '".$help['id']."' AND `id_user` = '".$ku['id']."' "));
if ($ku['time_start']>time()-$help['time'] && $check_url == $help['str_url'] && $off_on['close'] == 0 && isset($ku)) {
$help['help_text'] = str_replace('[user_nick]', $ku['nick'], $help['help_text']);
echo '<div class = "block">';
echo '<img src="/images/icons/user.png" width = "50" height = "50"> ';
echo $help['help_text'].'<br />';
echo '<a href="?close_help='.$help['id'].'">Больше не показывать</a>';
echo '</div>';
}
}