function plt_hide_dragblock_menus() {
//Hide the "DragBlock" menu.
remove_menu_page('dragblockAdminMenu');
//Hide the "DragBlock → DragBlock" menu.
remove_submenu_page('dragblockAdminMenu', 'dragblockAdminMenu');
//Hide the "DragBlock → Form Entries" menu.
remove_submenu_page('dragblockAdminMenu', 'edit.php?post_type=dragblockformmsg');
}
add_action('admin_menu', 'plt_hide_dragblock_menus', 11);