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For anyone who comes across this question. Related Posts for WordPress has the ability to automatically link posts and allows you to manually add, edit and remove the related posts. You can download it for free here: http://wordpress.org/plugins/related-posts-for-wp/
You should be using home_url() ( or something similar ) in your links for theme files when linking to pages. This will allow the domain to change and not affect your hardcoded links - assuming the ID's are the same of course. <a href="<?php echo home_url();?>/?page_id=634">Link</a> Good luck!
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