How to get the xml node value in jqgrid?

I need to get the xml node value of a particular rowid in jqgrid,below is the xml structure

<row id="2">
  <cell>2014-10-01</cell>
  <cell>Planning</cell>
  <cell>AG1454245847</cell>
  <cell></cell>
  <cell>Product</cell>
  <group>1</group>
</row>

I retrieved this data by using rawObject parameter in cellattr method,i need to retrieve group node value of row id 2