Show/Hide menu with jQuery

Menu 1 -

Sub Menu 1.1
Sub Menu 1.2
Sub Menu 1.3
Sub Menu 1.4
Sub Menu 1.5

Menu 2 -

Sub Menu 2.1
Sub Menu 2.2
Sub Menu 2.3
Sub Menu 2.4
Sub Menu 2.5

Menu 3 -

Sub Menu 3.1
Sub Menu 3.2
Sub Menu 3.3
Sub Menu 3.4
Sub Menu 3.5