.navbar-nav .dropdown .has_active > .dropdown-menu{ display: block; }
.dropdown-submenu { position: relative; }
.dropdown-submenu>.dropdown-menu {
    top: 4px;
    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; }

@media (min-width: 768px) {
    .navbar-nav > .dropdown:hover > .dropdown-menu { display: block; }
}
@media (max-width: 768px) {
    .navbar-nav > .dropdown > .dropdown-menu { display: block; }
}