This plug-in detect external links automatically and makes them no-follow , also open them in new tab.Simply enjoy.
Fork on github – https://github.com/rraju007/Wordpress-Nofollow-Master
1.Download this plgun.
2.Upload it by wordpress dashboard as usual.
3.And finally active it , thats it
Contributors & Developers
“WordPress Nofollow Master” is open source software. The following people have contributed to this plugin.Contributors