Here’s my solution :
First, make all of your pages you want to move to be a subitem of some other item(the best way is creating one for this action bacuse you will delete parent item).
Remeber that when you move your items you must move it with parent item like above.
Then put items in place you choosen and delete parent item . Here – “Stowarzyszenie” . I hope that language won’t be any problem 🙂 All done!
If you want to place moven items as a submenu then parent item must be on the level you choosen:
