.dropdown-submenu {
    position: relative;
}

.dropdown-submenu .dropdown-menu {
        top: 0;
        left: 100%;
        margin-top: -1px;
}
.dropdown-menu {
    background-color: #4cacec;
}
.dropdown-menu > li > a {
    background-color: #4cacec;
    color: #ecf0f1;
}