I can create submenus on localhost (my PC using Linux Mint 17 and LAMP) but when I try to do it on 2 different hosting sites the sub menu items will not save and go back to being top level items. You can see it at http://www.nookawarra.com/fragyle/development/.
I have tried de-activating all plugins with no joy.
Can anyone help? I have changed themes (several times) and am now using Corsa. Works fine on localhost but refuses to work on hosting site. The site is now in maintenance mode but if someone wants to look I will happily make it live. Everything else works exactly the same on both localhost and on line.