@media (min-width: 768px) {
    nav.navbar ul.nav > li > ul {
        top: 100%;
        left: 1px;
    }

    .dropdown-submenu {
        position: relative;
    }

        .dropdown-submenu > .dropdown-menu {
            top: 2px;
            left: calc(100% - 1px);
            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;
        }

    .navbar-nav > li > .dropdown-menu {
        border-top-right-radius: 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: transparent;
        border-top-color: #fff;
        border-width: 5px 5px 0 5px;
        margin-top: 8px;
    }

    ul.nav > li.dropdown-submenu > a:after {
        margin-left: 5px;
    }
}
@media (max-width: 767px) {
    .dropdown-menu {
        padding: 0;
    }
    ul.open li  {
        padding-left: 5px !important;
    }
    ul.open li a  {
        padding: 10px 15px !important;
    }
}