Bootstrap3多级下拉菜单

 

  .dropdown-submenu {

   position: relative;

  }

   .dropdown-submenu > .dropdown-menu {

    top: 0;

    left: 100%;

    margin-top: -6px;

    margin-left: -1px;

    -webkit-border-radius: 0 6px 6px 6px;

    -moz-border-radius: 0 6px 6px;

    border-radius: 0 6px 6px 6px;

   }

   .dropdown-submenu:hover > .dropdown-menu {

    display: block;

   }

   .dropdown-submenu > a:after {

    display: block;

    content: " ";

    float: right;

    width: 0;

    height: 0;

    border-color: transparent;

    border-style: solid;

    border-width: 5px 0 5px 5px;

    border-left-color: #ccc;

    margin-top: 5px;

    margin-right: -10px;

   }

   .dropdown-submenu:hover > a:after {

    border-left-color: #fff;

   }

   .dropdown-submenu.pull-left {

    float: none;

   }

    .dropdown-submenu.pull-left > .dropdown-menu {

     left: -100%;

     margin-left: 10px;

     -webkit-border-radius: 6px 0 6px 6px;

     -moz-border-radius: 6px 0 6px 6px;

     border-radius: 6px 0 6px 6px;

    }

Bootstrap 3多级下拉菜单

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