Я создал кодовое перо с вашим кодом, без тега i, я добавил значки на псевдоэлемент (: after), затем, скрывая от последнего элемента, вам, возможно, придется удалить их на небольшом экране. , Проверьте, поможет ли это вам
CodePen здесь
<html>
<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.1.0/css/all.css" integrity="sha384-lKuwvrZot6UHsBSfcMvOkWwlCMgc0TaWr+30HWe3a4ltaBwTZhyTEggF5tJv8tbt" crossorigin="anonymous">
<title></title>
<style>
.ibox {
border-style: solid;
border-color: black;
}
.col-md-3:after {
display: block;
font-weight: 900;
font-family: "Font Awesome 5 Free";
content: "\f105";
font-size: 20px;
float: right;
position: absolute;
right: -5px;
top: 100px;
color: red;
}
.col-md-3:last-child:after {
display:none;
}
</style>
</head>
<body>
<div class='container'>
<div class="row">
<div class="col-md-3">
<div class='ibox'>
<h2>Safari bug warning!</h2>
<p class="text-danger">As of v9.1.2, Safari exhibits a bug in which resizing your browser horizontally causes rendering errors in the justified nav that are cleared upon refreshing.</p>
<p>Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui. </p>
<p><a class="btn btn-primary" href="#" role="button">View details »</a></p>
</div>
</div>
<div class="col-md-3">
<div class='ibox'>
<h2>Heading</h2>
<p>Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui. </p>
<p><a class="btn btn-primary" href="#" role="button">View details »</a></p>
</div>
</div>
<div class="col-md-3">
<div class='ibox'>
<h2>Heading</h2>
<p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa.</p>
<p><a class="btn btn-primary" href="#" role="button">View details »</a></p>
</div>
</div>
<div class="col-md-3">
<div class='ibox'>
<h2>Heading</h2>
<p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa.</p>
<p><a class="btn btn-primary" href="#" role="button">View details »</a></p>
</div>
</div>
</div>
</div>
<!-- jQuery -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<!-- Minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
</body>
</html>
Чтобы скрыть стрелки на маленьких экранах, вы можете использовать медиа-запросы, см. Ниже
@media screen and (max-width: 991px) {
.col-md-3:after {
display: none;
}
}
Это скроет стрелки на всех экранах до 991 пикселей.