.mb-radio-control-wrap.with-images ul li {
    display: block;
    margin-bottom: 10px;
    max-width: 25%;
    width: 25%;
    float: left;
}

.mb-radio-control-wrap.with-images ul li label img {
    border: 3px solid transparent;
}

.mb-radio-control-wrap.with-images ul li input[type="radio"] {
    display: none;
}

.mb-radio-control-wrap.with-images ul li input[type="radio"]:checked + label img {
    border: 3px solid #3498db;
}
.mb-radio-control-wrap.with-images ul li label {
    padding: 0 3px;
    display: block;
}