i want to create a menu like this :
Item1
sublink1
sublink1-1
sublink1-2
sublink2
sublink3
sublink3-1
sublink3-1-1
sublink3-1-2
Item2
sublink1
sublink2
sublink2-1
sublink2-2
sublink3
sublink3-1
sublink3-2
Item3
sublink1
sublink2
the menu structure may change according to our needs so how can i create a configurable menu?