Affiliative links on a site decreases the serp,so is there any way to hide links from google?Currently i am using MaxBlogPress Ninj a Affiliate 1.8.1 plugin.

One way (easiest) is by using wp plugin - WP No External Links

gocode plugin

you can also do it manually by creating a folder on your webserver then put a index.php file in it whch contains a redirect code. I was using hostgators redirect service, it does the same thing in seconds.... but I guess I will look into those plugins above since some autoblogs need the redirects automated