Description:
------------
PHP SOAP extension produces invalid and incorrect SOAP request, see actual result. __soapCall was tried, direct ->functionName(attributes) approach tried as well.

Reproduce code:
---------------
http://pastebin.com/d4a1551db

Expected result:
----------------
No Exception thrown, SOAP request should be something like this:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns="http://www.tsystems.com/zfinder/1.0">
   <soapenv:Header/>
   <soapenv:Body>
      <ns:getLebenslageTree>
         <lebenslageKey>
            <id>93256</id>
            <mandantenId>0</mandantenId>
         </lebenslageKey>
         <kategorieIds>783160</kategorieIds>
         <kategorieIds>783161</kategorieIds>     
         <mandantenIds>0</mandantenIds>
         <profilData>
            <ags>0</ags>
            <plz>0</plz>
            <sprache>deu</sprache>
         </profilData>
      </ns:getLebenslageTree>
   </soapenv:Body>
</soapenv:Envelope>

Actual result:
--------------
Exception from server because of wrong request, SOAP request is the following:

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
	xmlns:ns1="http://www.tsystems.com/zfinder/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:xsd="http://www.w3.org/2001/XMLSchema">
	<SOAP-ENV:Body>
		<ns1:getLebenslageTree xsi:type="ns1:PrimaryKeyWs">
			<id>93256</id>
			<mandantenId>0</mandantenId>
		</ns1:getLebenslageTree>
		<param1>
			<xsd:int>783160</xsd:int>
			<xsd:int>783161</xsd:int>
		</param1>
		<param2>
			<xsd:int>0</xsd:int>
		</param2>
		<param3>false</param3>
		<param4 xsi:type="ns1:ProfilDataWs">
			<ags>0</ags>
			<plz>0</plz>
			<sprache>deu</sprache>
			<regionIds xsi:nil="true" />
			<mandantenIds xsi:nil="true" />
			<kategorien xsi:nil="true" />
			<kategorienUndVerknuepfung />
		</param4>
	</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Which is TOTALLY wrong... :(