Or install a Custom CSS plugin
http://wordpress.org/plugins/search.php?q=custom+css
and use this in it
#footer .left, #footer .right { display: none; }
#footer:before, #footer:after { display: inline-block; margin: 10px; }
#footer:before { content: "Hello"; }
#footer:after { content: "World"; float:right; }
This CSS way is not as good as real content by overwriting footer template, but it also get the job done.