if (isset($_GET['cat'])){
	
$query = "SELECT * FROM categorys WHERE subgroupof = 'NONE' ORDER BY categoryname"; 

$result = mysql_query($query) or die(mysql_error());

while($row = mysql_fetch_array($result)){
	echo '<li><A href="index.php?cat='.$row['categoryname'].'&action=cat">'.$row['categoryname'].'</a>';
	if ($row['categoryname'] === $_GET['cat']){
		
			$query = "SELECT * FROM categorys WHERE subgroupof = '".$row['categoryname']."' ORDER BY categoryname"; 
			
			$result = mysql_query($query) or die(mysql_error());
			echo '<ul>';
			while($row = mysql_fetch_array($result)){
				echo '<li><A href="index.php?cat='.$row['categoryname'].'&action=cat">'.$row['categoryname'].'</a></li>';
			}
			echo '</ul></li>';
		
	} else { echo '</li>'; }
}

}