bootstrap-nav-tab-scrollable.css

.horizontal-scrollable-tabs {
  min-height: 50px;
}

.horizontal-scrollable-tabs .arrow-right {
  float: right;
}
.horizontal-scrollable-tabs .arrow-left {
  float: left;
}
/* Customize your arrows here */
.horizontal-scrollable-tabs .scroller {
  font-size: 18px;
  color: red;
  padding: 10px 10px; 
  display: none;
}
.horizontal-scrollable-tabs .scroller.disabled {
  color: gray;
}
.horizontal-scrollable-tabs .horizontal-tabs .nav-tabs-horizontal {
  overflow-x: auto;
  overflow-y: hidden;
  display: -webkit-box;
  display: -moz-box;
}
/* As it has a mobile focus the scrollbar is removed */
.horizontal-scrollable-tabs .horizontal-tabs .nav-tabs-horizontal::-webkit-scrollbar {
  width: 0 !important;
}
/* It's good to add a min-width so that the items have the same width */
.horizontal-scrollable-tabs .horizontal-tabs .nav-tabs-horizontal > li {
  float: none;
  min-width: 50px;
  text-align: center;
}