PHP - 从php数组构建多级HTML菜单，组合基于值名称的值

I have searched a bit on SO and haven't been able to find this unique use case, but maybe I don't know how to phrase it. I am looking to use a PHP array (see format below) to build a dynamic HTML menu that duplicates identical string values into sub menus when a match exists.I have searched a bit on SO and haven't been ab