How to exlclude …?

I want to exclude return to Homepage from my homepage footer’s but keep it for the rest. What coding should I put in and where. I know it goes somewhere but not sure where. Thanks .
<!– Footer NAV Navigator –>
<div class=”footer_nav”>
<div class=”list”>
<!– <div class=”prev”>« PREV.PAGE</div> –>
<div class=”cen”>“>Return <i>to the</i> Homepage<!– If it’s not the homepage!–></div>
<!– <div class=”next”>NEXT.PAGE »</div> –>
</div>
<div class=”clear”></div>
</div>