how to add value to Root node in message mapping i.e. to

Hi Experts,

  please provide me any  UDF or Java or XSLT maaping code to add text into the root node of the payload i.e. my target Payload will be like

<ns1:sObjects>

<ns2:Id>123</ns2:Id>

<ns2:name>Test message <n/s2:name>

</ns1:sObjects>

and i have to get it like

<ns1:sObjects xsi:type="Account">

<ns2:Id>123</ns2:Id>

<ns2:name>Test message <n/s2:name>

</ns1:sObjects>

Regards,

Yugandhar