<?php
$xmlstr = '<Request>'.
'</Request>';
$sxe = new SimpleXMLElement($xmlstr);
$authentication = $sxe->addChild('Authentication');
$authentication->addChild('Version', '2.0');
$processid = $sxe->addChild('Process ID=importSale');
$importsale = $processid->addChild('importSale');
$importsale->addChild('SCRIPTCODE', '<![CDATA[SCRIPT001]]>');
$importsale->addChild('PRODID','<!CDATA[DNTMAN]]>');
echo $sxe->asXML();