How to add column headers in BI Publisher OOTB Template

Hi Experts,

I am using OOTB Template provided by Oracle BI Publisher which is of the format (XPT). I am able to generate a report with all required values. But i need to add a column header for the report generated. For Example:

From the below i need to add a column header as "Role Information " for the columns such as Role Name, Role Owner Name, Role Owner PIC, etc.,  and i need to add column header as "Entitlement Information" for columns such as Entitlment Name, Ent User Name, Ent User PIC etc.,

Urgent help is highly appreciated.

Thanks in advance.