CIBlockCMLExport::formatXMLNode

function formatXMLNode($level, $tagName, $value)
{
	if(is_array($value))
	{
		$xmlValue = "";
		foreach($value as $k => $v)
		{
			if($k)
				$xmlValue .= "n".rtrim($this->formatXMLNode($level+1, $k, $v), "n");
		}
		$xmlValue .= "n".str_repeat("t", $level);
	}
	else
	{
		$xmlValue = htmlspecialcharsbx($value);
	}

	return str_repeat("t", $level)."<".$tagName.">".$xmlValue."n";
}