I am trying to select only one category for each custom post . I have used "Only One Category" plugin . But it is also working on general post. I only need that only for custom post . Please tell me how can i do that?
you can create pages for each post type categories and display it each page
like archive-{post_type}.php
you cam view this page
You can control what to show in the post editor better with http://wordpress.org/plugins/radio-buttons-for-taxonomies/ .Works for both categories and tags.