(Sorry my poor english)
I have data:
[
'mainGrp1'=>['subGrp1.1'=>[1,2,3],'subGrp1.2'=>[a,b,c],'subGrp1.3'=>[4,5,6]],
'mainGrp2'=>['subGrp2.1'=>[1,2,3,4,5],'subGrp2.2'=>[a,b,c,d,e]],
'mainGrp3'=>['subGrp3.1'=>[1,2]]
]
I like this result: excel result
My question: how to merge cells in row 1 dinamically size, and how to group headers name data?
Thank you! Andrew