title: Anchor link disappears after click in IE
body: <p>I am using <code>site_url</code> for buttons in CodeIgniter, when you click the button a PDF downloads. it works fine in Chrome and Firefox, but in IE when I click on the button the PDF downloads, but the button disappears. What Am I doing wrong?</p>
  
  <p>here is the whole code <code>&lt;li&gt;&lt;a href="&lt;?php echo site_url('admin/button/pdf');?&gt;"&gt;Download PDF&lt;/a&gt;&lt;/li&gt;</code></p>