Active menu trail for multiple menu item with the same path It is possible to have menu items that point to the same node and have the active state dynamic?

If I click the link 'List item A1' I would like to become active the link 'List item A'.

If I click the link 'List item B1' I would like to become active the link 'List item B'.

 - List item A (node/1)
 --  List item A1 (node/2)

 - List item B (node/3)
 --  List item B1 (node/2)
You can use the module menu-position for this. When you add a new rule, just choose the option Mark the rule's parent menu item as being "active" on the settings page. You probably have to create a css rule for your theme, too.