.navbar-nav li:hover > ul.dropdown-menu {
    display: block;
}

.dropdown-submenu {
    position:relative;
}
.dropdown-submenu>.dropdown-menu {
    top:0;
    left:100%;
    margin-top:-16px;
}

/* rotate caret on hover */
.dropdown-menu > li > a:hover:after {
    text-decoration: underline;
    transform: rotate(-90deg);
} 

/*
li {
	transition-duration: 0.75s;
}

ul li ul {
  transition: all 0.75s ease;
}
*/