DEAR VISITOR SO FAR I KNOW STILL NOW THERE IS NO EASY WAY TO CREATE SUB LABEL UNDER A LABEL BUT YOU CAN DO BY FOLLOWING INSTRUCTIONS:
GO TO DASHBOARD

CLICK ON EDIT POST

SELECT YOUR POST AND CLICK ON LABEL ACTION
SELECT NEW LABEL

WRITE YOUR DESIRE
SUB LABEL NAME WHICH YOU WANT

AFTER SELECTING YOUR SUB MENU NOW YOU HAVE TO GO DASHBOARD AND CLICK ON DESIGN

CLICK ON ADD A GADGET

SELECT LABEL

WRITE YOUR MENU NAME AND SELECT YOUR SUB MENU ITEM

AFTER THAT CLICK ON SAVE.
BY THIS WAY YOU CAN CREATE MENU AND SUB MENU AND ARRANGE THEM AS MANY AS YOU WANT.
GO TO DASHBOARD

CLICK ON EDIT POST

SELECT YOUR POST AND CLICK ON LABEL ACTION
SELECT NEW LABEL

WRITE YOUR DESIRE
SUB LABEL NAME WHICH YOU WANT

AFTER SELECTING YOUR SUB MENU NOW YOU HAVE TO GO DASHBOARD AND CLICK ON DESIGN

CLICK ON ADD A GADGET

SELECT LABEL

WRITE YOUR MENU NAME AND SELECT YOUR SUB MENU ITEM

AFTER THAT CLICK ON SAVE.
BY THIS WAY YOU CAN CREATE MENU AND SUB MENU AND ARRANGE THEM AS MANY AS YOU WANT.
Thanks for the Tips. lets seeeee
thanks for useful tips
This method is no longer valid.