I have a link ptcpune.in/index.php/sitemap and in webmaster it says there is no sitemap as its not detecting.
i need to change it to ptcpune.in/sitemap as from SEO Point of view.
Please suggest steps as to how to do it.
You need to generate a sitemap in xml format for search engines. There are plugins for Wordpress which will do this for you - see http://www.sitepoint.com/community/t/add-google-sitemap-in-wordpress/41810 for a couple of suggestions.
Webmaster Tools Help also has advice and information about sitemaps.