Parse error: syntax error, unexpected T_ELSE in /home/figaces6/public_html/catalog.php on line 28

<?
include 'db.php';
include 'function.php';
head();
$q = mysql_query("SELECT * FROM `kat`");
if(isset($_GET['id'])){
if(mysql_num_rows($q) ==  0){
echo '<div class="linkt"><b>Нет такой категории!</b></div>';
foot();
exit;
}
else{
$mus = mysql_result(mysql_query("SELECT COUNT(*) FROM `music` WHERE `id_kat` = '".intval($_GET['id'])."'"), 0);
$a = mysql_fetch_assoc(mysql_query("SELECT * FROM `kat`"));
echo  '<div class="title"><center>Категория '.$a['name'].'</center></div><div class="menu">';
if($mus != 0){
$db = mysql_query("SELECT * FROM `music` WHERE `id_kat` = '".htmlspecialchars(intval($_GET['id']))."' ORDER BY `id` DESC");
while($j=mysql_fetch_assoc($db)){
echo '<div class="linkt">♫ <a href="/file-'.intval($j['id']).'.html">'.$j['name'].'</a></div>';
}
foot();
exit;
}
else{
echo '<div class="linkt">Нет категорий...</div>';
}
}
else{
echo '<div class="linkt">В данной категории нет аудиозаписей...</div>';
foot();
exit;
}
}
else{
echo '<div class="title"><center>Категории</center></div><div class="menu">'; 
while($l=mysql_fetch_assoc($q)){
echo '<div class="linkt">» <a href="/catalog-'.intval($l['id']).'.html">'.$l['name'].'</a></div>'; 
}
foot();
exit;
}
?>