fad.lee

I think you did it wrong. Its javascript code, you should add it to your footer.php file, not functions.php.

So you want to redirect non-existing page on your WP? To google.com?

I have the same problem. Currently I’m using this hack:

// wordpress 3.8 rtl icon hack
add_action( 'admin_head', function() {
?>
<style>
span.mce_rtl:before {
  content: '\f320';
}
span.mce_rtl {
  -moz-transform: scaleX(-1);
  -o-transform: scaleX(-1);
  -webkit-transform: scaleX(-1);
  transform: scaleX(-1);
  filter: FlipH;
  -ms-filter: "FlipH";
}
</style>
<?php
});

The flipping CSS code is from here: https://css-tricks.com/snippets/css/flip-an-image/