ReReplacer is a Joomla! component and system plugin that enables you to replace anything in your Joomla! site’s output with whatever you want. ReReplacer – search and replace in your websites output.
ReReplacer will search the text (html) of your pages for your search request and replace it with what you have told it to do.
These replacements are on the fly. That means they are not permanent. They are done every time you request a web page in your site.
This gives you great possibilities and power to manipulate the output of your site.