Overskrive/erstatte soap header

class mySoap extends SoapClient
{
    public function __doRequest($request, $location, $action, $version)
    {
        $result = parent::__doRequest($request, $location, $action, $version);
        $result = str_replace('<key xsi:type="xsd:int">', '<key xsi:type="xsd:string">', $result);
        return $result;
    }
}

if (!class_exists("XSoapClient")) {
    class XSoapClient extends SoapClient {
        public function __doRequest($request, $location, $saction, $version, $one_way = 0) {
            echo $request." request<br>";
            echo $location." location<br>";
            echo $saction." action<br>";
            $aReplace = array('xmlns:ns1', 'xmlns:ns2');
            $aReplaceTo = array('xmlns:pho', 'xmlns:tem');
            //$dom = new DOMDocument();
            $request = str_replace($aReplace, $aReplaceTo, $request);
            //$dom->loadXML($request);
            //echo $request;
            return parent::__doRequest($request, $location, $saction, $version, $one_way = 0);
        }
    }
}

$objVar_Session_Inside = new SoapVar($this->ApplicationHeader(), XSD_ANYXML, null, null, null);
        $actionHeader = new SoapHeader($ns, 'Security', $objVar_Session_Inside, false);
        $this->oClient->__setSoapHeaders($actionHeader);

        try {
            $this->oResult = $this->oClient->RegisterApplication(array('application' => $tBodyXML));
        } catch

private function XWebServiceObject() {
        try {
            $this->oClient = new XSoapClient($this->tWSDL, $this->aOptions);
        } catch (Exception $exception) {
            $this->tError .= $exception->getMessage();
        }
    }

/** Add namespaces to nodes */
        $tRegisterNS = "http://tempuri.org/";
        $oSoapVar = new SoapVar($tBodyXML, XSD_NAMESPACE, 'RegisterApplication', $tRegisterNS, 'xmlns');
        $this->oClient->RegisterApplication(new SoapParam($oSoapVar, 'RegisterApplication'));