纯css画三角形，勾等形状

//三角形

.money-ul li.active:after {
    content: "";
    position: absolute;
    bottom: 0;
    right: 0;
    border-bottom: 13px solid red;
    border-left: 15px solid transparent;
}

//勾

.money-ul li.active:before{
    content: '';
    position: absolute;
    width: 7px;
    height: 3px;
    background: transparent;
    bottom: 3px;
    right: 0px;
    border: 2px solid white;
    border-top: none;
    border-right: none;
    -webkit-transform: rotate(-55deg);
    -ms-transform: rotate(-55deg);
    transform: rotate(-55deg);
    z-index: 9;
}