How to sort from for each in PHP - php

Question

From an array I start for each entry a function with a argument from the array (its friends from facebook). The function returns either 0 or a number bigger than 0. So at the moment, it justs displays it all mixed up, but I want it to show first all entries which get the result bigger than 0 from the function and then all, which are 0. I've no idea, how to do this.
This is my current code.
foreach ($friends as $key=>$value) {
//removed unimportant things
$friendresult = friendscore($id = $fvalue[id]);
if ($friendresult == "0") {
echo '<li>';
echo '<a class="box" href="javascript:invite('. $fvalue[id] . ')">';
echo '<img src="https://graph.facebook.com/' . $fvalue[id] . '/picture" title="' . $fvalue[name] . '" />';
echo '<label>' . $fvalue[name] . '</label>';
echo '<b>Invite</b>';
echo '</a>';
echo '</li>';
}
if ($friendresult !=="0"){
echo '<li>';
echo '<a class="box">';
echo '<img src="https://graph.facebook.com/' . $fvalue[id] . '/picture" title="' . $fvalue[name] . '" />';
echo '<label>' . $fvalue[name] . '</label>';
echo '<div class="totaltext">Score:'.$friendresult. '</div>';
echo '</a>';
echo '</li>';
}}
Edit: Found solution. Sometimes its too simple.
if ($friendresult == "0") {
$friend.= '<li>';
$friend.= '<a class="box" href="javascript:invite('. $fvalue[id] . ')">';
$friend.= '<img src="https://graph.facebook.com/' . $fvalue[id] . '/picture" title="' . $fvalue[name] . '" />';
$friend.= '<label>' . $fvalue[name] . '</label>';
$friend.= '<b>Invite</b>';
$friend.= '</a>';
$friend.= '</li>';
}
if ($friendresult !="0"){
$nofriend.= '<li>';
$nofriend.= '<a class="box">';
$nofriend.= '<img src="https://graph.facebook.com/' . $fvalue[id] . '/picture" title="' . $fvalue[name] . '" />';
$nofriend.= '<label>' . $fvalue[name] . '</label>';
$nofriend.= '<div class="totaltext">Score:'.$friendresult. '</div>';
$nofriend.= '</a>';
$nofriend.= '</li>';
}
echo $friend.$nofriend;