Have a webpage that will be viewed by mainly IE users, so CSS3 is out of the question.

I want it to list like:

A  D  G
B  E  H
C  F  I

Here is the function that currently lists like:

A B C
D E F
G H I

function listPhoneExtensions($group,$group_title) {
  $adldap = new adLDAP();
  $group_membership = $adldap->group_members(strtoupper($group),FALSE);

    sort($group_membership);
    print "
    <a name=\"".strtolower($group_title)."\"></a>
    <h2>".$group_title."</h2>
    <ul class=\"phone-extensions\">";
  foreach ($group_membership as $i => $username) {
      $userinfo = $adldap->user_info($username, array("givenname","sn","telephonenumber"));
      $displayname = "<span class=\"name\">".substr($userinfo[0]["sn"][0],0,9).", ".substr($userinfo[0]["givenname"][0],0,9)."</span><span class=\"ext\">".$userinfo[0]["telephonenumber"][0]."</span>";
      if($userinfo[0]["sn"][0] != "" && $userinfo[0]["givenname"][0] != "" && $userinfo[0]["telephonenumber"][0] != "") {
        print "<li>".$displayname."</li>";
      }
    }
    print "</ul><p class=\"clear-both\"><a href=\"#top\" class=\"link-to-top\">&uarr; top</a></p>";
}

Example rendered html:

<ul class="phone-extensions">
<li><span class="name">Barry Bonds</span><span class="ext">8281</span></li>
<li><span class="name">Gerald Clark</span><span class="ext">8211</span></li>
<li><span class="name">Juan Dixon</span><span class="ext">8282</span></li>
<li><span class="name">Omar Ebbs</span><span class="ext">8252</span></li>
<li><span class="name">Freddie Flank</span><span class="ext">2281</span></li>
<li><span class="name">Jerry Gilmore</span><span class="ext">4231</span></li>
<li><span class="name">Kim Moore</span><span class="ext">5767</span></li>
<li><span class="name">Barry Bonds</span><span class="ext">8281</span></li>
<li><span class="name">Gerald Clark</span><span class="ext">8211</span></li>
<li><span class="name">Juan Dixon</span><span class="ext">8282</span></li>
<li><span class="name">Omar Ebbs</span><span class="ext">8252</span></li>
<li><span class="name">Freddie Flank</span><span class="ext">2281</span></li>
<li><span class="name">Jerry Gilmore</span><span class="ext">4231</span></li>
<li><span class="name">Kim Moore</span><span class="ext">5767</span></li>
<li><span class="name">Barry Bonds</span><span class="ext">8281</span></li>
<li><span class="name">Gerald Clark</span><span class="ext">8211</span></li>
<li><span class="name">Juan Dixon</span><span class="ext">8282</span></li>
<li><span class="name">Omar Ebbs</span><span class="ext">8252</span></li>
<li><span class="name">Freddie Flank</span><span class="ext">2281</span></li>
<li><span class="name">Jerry Gilmore</span><span class="ext">4231</span></li>
<li><span class="name">Kim Moore</span><span class="ext">5767</span></li>
</ul>

Any help is appreciated to getting it to list alpha vertically.