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You could use this search and replace tool: search and replace by interconnectit Apart from that you could put some redirects in your htaccess, but really the search and replace works great.
First of all, you are using $rinter as a number and at the same time as an URL for the anchor element. Secondly, the href attribute requires mentioning the protocol (http(s):// for example) in front of the domain or else it will just be relative to the current viewing address. ($rinter should be something like http://www.w3.org instead of just www.w3.org)
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