.dropdown-submenu {
    position: relative;
}

    .dropdown-submenu > .dropdown-menu {
        top: 0;
        left: 100%;
        margin-top: -6px;
        margin-left: -1px;
        -webkit-border-radius: 0 6px 6px;
        -moz-border-radius: 0 6px 6px;
        border-radius: 0 6px 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: #fff;
    }

    .dropdown-submenu.pull-left {
        float: none;
    }

        .dropdown-submenu.pull-left > .dropdown-menu {
            left: -100%;
            margin-left: 10px;
            -webkit-border-radius: 6px 0 6px 6px;
            -moz-border-radius: 6px 0 6px 6px;
            border-radius: 6px 0 6px 6px;
        }

/* Disable link */
a.disabled,
a.disabled:visited,
a.disabled:active,
a.disabled:hover {
    color: #999;
    cursor: not-allowed;
    text-decoration:none !important;
}

.dropdown-menu a.disabled,
.dropdown-menu a.disabled:visited,
.dropdown-menu a.disabled:active,
.dropdown-menu a.disabled:hover {
    color: #999;
    cursor: not-allowed;
    background-color: white;
    text-decoration:none !important;
}