PHP include with links

I want to use a link <a> to go back to show_news.php on http://testjantje.000webhostapp.com/2016/index.php?id=4

Now I use <a href="../show_news.php" style="color: #ee4444; text-decoration: none; text-transform: none;">TERUG</a>
But this opens the page outside of the webppage.
How can I keep this page in the include?