$parser = new Varien_Convert_Parser_Xml_Excel();
        $io     = new Varien_Io_File();

        $path = Mage::getBaseDir('var') . DS . 'export' . DS;
        $name = md5(microtime());
        $file = $path . DS . $name . '.xml';
       
        $fileName   = 'orders.xml';
        $io->setAllowCreateFolders(true);
        $io->open(array('path' => $path));
        $io->streamOpen($file, 'w+');
        $io->streamLock(true);
        $io->streamWrite($parser->getHeaderXml($fileName));
        //$io->streamWrite($parser->getRowXml($this->_getExportHeaders()));

        //$this->_exportIterateCollection('_exportExcelItem', array($io, $parser));
        foreach($newRow as $singleRow){
            if(is_array($singleRow)){
                $io->streamWrite($parser->getRowXml($singleRow));
            }
        }
        $io->streamWrite($parser->getFooterXml());
        $io->streamUnlock();
        $io->streamClose();