How to Perform Multilevel Column Spanning

                     2013

         ColA                      ColB                ColC

Col1 Col2 Col3   Col1 COl2 COl3   Col1 Col2 COl3

I want to create a structure of above type in my report. So I used colSpan of to set Col1 Col2 and Col3 under ColA. That is working...

But again how can I set ColA, ColB and ColC under 2013. In short how to perform one more level of spanning... Can someone please help me to achive this requirement using Dynamic Jasper