<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

<script>
$(document).ready(function () { 
  $("<p class='disclaimer'>Type your disclaimer here.</p>").insertBefore(".blog-item-content");
});
</script>
 -------css---- 
 .disclaimer 
  background-color: #f6f6f6;
  padding: 10px;
  font-style: italic;
}