I find a little solution. On Bootstrap3.css was one row as comment.
/*.dropdown-submenu:hover>.dropdown-menu{display:block;}*/
I delete the comment sign, now it works with hover. Its not like the example but it works a little. But dont know how it is with touch.
/*.dropdown-submenu:hover>.dropdown-menu{display:block;}*/
I delete the comment sign, now it works with hover. Its not like the example but it works a little. But dont know how it is with touch.