[Shamun]

If your site is small, you can do something like this:

{if $cat eq '1'}
Affiliate stuff for category ID 1

{elseif $cat eq '2'}
Affiliate stuff for category ID 2

{elseif ( $cat eq '3' || $cat eq '4' ) }
Affiliate stuff that will show if in either cat #3 or 4.

{elseif $cat gte '5'}
Affiliate stuff that will show if in cat 5 or higher

{elseif $cat gt '5'}
Affiliate stuff that will show if in cat 6 or higher.
{/if}