I try to create a plugin to add a menu in the administration area for 12h, but with no success, and i need you HELP to
add a new top-level menu with title : Manage
and 2 submenu to the custom top-level menu:
-First with title "Manage products" with a link : /edit.php?go=manage
-Second with title "Add products" with a link : /post-news.php?go=addnew
thanks a lot for your help.