In your extra.less template add these codes:
In the dropdown forum menu :
In the drop-down menu what's up :
In the drop-down menu members :
Result:
In the dropdown forum menu :
LESS:
You must log in to view
(13 lines)
In the drop-down menu what's up :
LESS:
You must log in to view
(4 lines)
In the drop-down menu members :
LESS:
You must log in to view
(4 lines)
Result: