Open External link with new tab in your blogger

This will help you to open your every external link
with new tab.try this.

1. Log in to your blogger account and go to  Design >>  Edit HTML

2. Find this tag By using Ctrl+F          </head>

3. Paste below code before the </head>   tag

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
 <script type="text/javascript">
   
$(document).ready(function () {

            // ---- External Links ----------------------------------------------------------------------------------------------------

                $("a[href*='http://']:not([href*='"+location.hostname+"']),[href*='https://']:not([href*='"+location.hostname+"'])").attr("target","_blank").attr("title","Opens new window").addClass("external");

    });
    </script>

4. now click preview and click save template. you are done.