How do i create a structured header in ALV or any other grid layout in SAP ABAP? -

so illustrate:

 |         category            |         category b            |  c  | |     a.a       |      a.b      |      a.a      |      a.b      |     | | a.a.a | a.a.b | a.b.a | a.b.b | b.a.a | b.a.b | b.b.a | b.b.b |     | 

i need header looks , wondering if there's way other manually write each line. :d

depending on scenario, might able bend xxl api generate list in excel. try executing demo program xxlftest , have export results pivot table - maybe use this? other that, know of no control able this. write stuff yourself, of course, or try persuade users have hierarchy on vertical axis , use standard column tree...