I was wondering if it is possible somehow to pass parameters to $function in the <?php add_submenu_page( $parent_slug, $page_title, $menu_title, $capability, $menu_slug, $function); ?>
Try to use something like this: add_submenu_page("productions", 'Edit', 'Edit', 'read', "add-productions", create_function('', 'production_content_page(true);'));