You shouldn't have a colon after the if queries and you aren't using braces. I'm also pretty certain that the value for a box to be unchecked is actually just blank, not "unchecked". I suggest trying this:
<td>FooterMenu</td>
<td><input type="checkbox" name="FooterMenu" value="1" checked="<?php if($FooterMenu == 1){echo "checked";}else{echo "";} ?>" /></td>