How do i cover up a link?

i cut a deal with a big player in my market. it is if i was willing to advertize with them i could post content on there site with author credentials back links to my site.

they have a pr 7 on some pages and pr 8 on other pages they said i could post on there site once a month. my site is a pr 1.

is there a way to put there link on my site so they can see it but make it where the spider cant see it?

or does it not mater sense im posting my on there site more than they have something on my site?

would greatly appreciate some input.

thanks

Why not just be happy to get a pr7 or 8 link to your site and not screw them over?

i thought if i had reciprocal link to there site it negated my link from there site.

am i wrong? if so great i wont f with it.