.dropdown {
    position:relative;
}
.dropdown>.dropdown-menu {
    top: 80%;
    left: -95%;
    -webkit-border-radius:0 6px 6px 6px;
    -moz-border-radius:0 6px 6px 6px;
    border-radius:0 6px 6px 6px;
}

.dropdown:hover>.dropdown-menu {
    display:block;
}

@media (max-width: 767px) {
    .dropdown>.dropdown-menu {
        left: -160%;
    }
}