You may always put your static html files in a subdirectory, say example.com/static/
Then add a mod_rewrite in your apache vhost configuration or .htaccess rules to allow access to files inside this subdirectory.
RewriteEngine On
RewriteCond %{REQUEST_URI} !^/static*
RewriteRule !\.(gif|ico|jpe?g|png|css|js)|var(.+)storage.pdf(.+)\.pdf$ index.php
If you must include html content inside of an object (article / product / etc) you may use this contribution. <i>http://www.ez.no/community/contribs/hacks/embedded_html_for_literal_tag</i>
