I am running a website http://android.org.in. My almost URLs contain "/tags/" path. (e.g. http://android.org.in/tags/android-torrent OR /tags/angrybirds-free-download">http://android.org.in/tags/angrybirds-free-download.
At the time of first setup I forgot to remove or change this. Now people are thinking that it is the page which contains only tag list, so they hesitate to visit to the page. But it is "/tags/" not a "/tag/". Now I want to change it to "/posts/" without affecting my search engine ranking. Because as per Google Webmaster Tools, Google has Indexed more than 3000 URLs and approx. more than 2000 URLs contains "/tags/" in a path. So please suggest me how I can redirect permanently all the URLs to new URLs without affecting my search engine ranking?
I am in big trouble and I need your help.
Thanks in advance.