.mb-instagram-pack-feed li {
  list-style: none;
  float: left;
  display: inline-block;
  width: 25%;
  margin: 0;
  padding: 0;
  font-size: 0;
  line-height: 0;
  position: relative;
}

.mb-instagram-pack-feed:after {
  clear: both;
  content: '';
  display: inline-block;
  width: 100%;
}

.mb-instagram-pack-feed li a {
  padding: 5px;
  display: inline-block;
  margin: 0;
}