Да да да,ты прав,правильнее так
$req = mysql_query("SELECT `id`, `name`, `datereg` FROM `users` WHERE (sex='m') ORDER BY `datereg` DESC LIMIT 1; ");
$arr = mysql_fetch_array($req);
echo '<div class="list2"><img src="../files/photo/' . $arr['id'] . '_small.jpg" alt="' . $arr['name'] . '" border="1" /><br> ';
print '<a href="../str/anketa.php?id=' . $arr['id'] . '">' . $arr['name'] . '</a></div>';
$req = mysql_query("SELECT `id`, `name`, `datereg` FROM `users` WHERE (sex='zh') ORDER BY `datereg` DESC LIMIT 1; ");
$arr = mysql_fetch_array($req);
echo '<div class="list2"><img src="../files/photo/' . $arr['id'] . '_small.jpg" alt="' . $arr['name'] . '" border="1" /><br/> ';
print ' <a href="../str/anketa.php?id=' . $arr['id'] . '">' . $arr['name'] . '</a></div>';