It should be as simple as
<!--[if IE gt 8]><!--> content here <!--<![endif]-->
- IE 8 and below will respect the condition and not show the content
- IE 9 will pass the condition (because it is not IE 8) and show the content
- Everything else (including IE 10 and 11) will ignore the conditional as simply a comment and show the content
(edit: just noticed you said versions 8 and below. Updated answer to reflect that)