How arrange folders and files in FCKeditor in alphabetical order

<?php 
class GetFolders {
 var $fckphp_config;
 var $type;
 var $cwd;
 var $actual_cwd;
 
 function GetFolders($fckphp_config,$type,$cwd) {
  $this->fckphp_config=$fckphp_config;
  $this->type=$type;
  $this->raw_cwd=$cwd;
  $this->actual_cwd=str_replace("//","/",($fckphp_config['UserFilesPath']."/$type/".$this->raw_cwd));
  $this->real_cwd=str_replace("//","/",($this->fckphp_config['basedir']."/".$this->actual_cwd));
 }
 
 function run() {
  header ("content-type: text/xml");
  echo "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n";
  ?>
<Connector command="GetFolders" resourceType="<?php echo $this->type; ?>">
 <CurrentFolder path="<?php echo $this->raw_cwd; ?>" url="<?php echo $this->actual_cwd; ?>" />
 <Folders>
  <?php
   if ($dh=opendir($this->real_cwd)) {
    while (($filename=readdir($dh))!==false) {
     if (($filename!=".")&&($filename!="..")) {
      if (is_dir($this->real_cwd."/$filename")) {
       
       //check if$fckphp_configured not to show this folder
       $hide=false;
       for($i=0;$i<sizeof($this->fckphp_config['ResourceAreas'][$this->type]['HideFolders']);$i++) 
        $hide=(ereg($this->fckphp_config['ResourceAreas'][$this->type]['HideFolders'][$i],$filename)?true:$hide);
       
       if (!$hide) echo "<Folder name=\"$filename\" />\n";
      }
     }
    }
    closedir($dh);
   }
-----------------------------------------------as per forum people suggested here I add 
sort($folders);
foreach($folders as $k=>$v) {
	echo "<Folder name=\"$v\" />\n";
}
-----------------------------------------------  
?>
 </Folders>
</Connector>
  <?php
 }
}
?>