most site now use bot to crawl my site and create automatic content as book mark and giving backlink my site. i want to stop such crawl except googlel and few more sites.
You can use robots.txt to stop specific bots from crawling your site. But if it is bad bot, then they may not follow robots rule. You need to use .htaccess to block their ip address from where the bots are operating. BTW, I never heard this before, bots creating links on your pages !!, You may be talking about trackback, they are links t other sites who linked to you, you can easily remove them from settings page.