Question

How to remove the command "no follow" from all the links

Answer 1

http://www.question2answer.org/qa/8364/how-to-remove-nofollow-for-links-to-own-website

Although if you want to remove it from all links (bad idea IMO because it may encourage spam) then you could replace preg_replace with str_replace('rel="nofollow"', '', $str );

Comments

Where is this code? Which page?

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Read my answer on that page - you need to create a custom theme.

One alternative would be to hack the core, see qa-app-format.php, lines 679 and 693. Just remove the bit that says rel=nofollow.