too long

I have a soap response with this structure in PHP:

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"  xmlns:srv="http://srv.soap.factura.sit.mx.com">
<soap:Body>
<srv:responseXMLT>
<return>&lt;tfd:ValorXML version="1.0" Key="000XY 212XH" FechaResponse="2014-05-14T14:37:45"/>
</return>
</srv:timbraCFDIXMLTestResponse>

I want to read the data inside of return and save each value in a database, but how can I read the value of .??

Thanks for all!!