[BBR-APBT]

There are currently 12 hooks available for use in the CMS.

<hook>vbcms_widgetdm_start</hook>
<hook>vbcms_widgetdm_presave</hook>
<hook>vbcms_widgetdm_postsave</hook>
<hook>vbcms_widgetdm_postdelete</hook>
<hook>vbcms_article_defaultcontent_start</hook>
<hook>vbcms_article_defaultcontent_end</hook>
<hook>vbcms_articleblog_presave</hook>
<hook>vbcms_articlepost_presave</hook>
<hook>vbcms_article_populate_start</hook>
<hook>vbcms_article_populate_end</hook>
<hook>vbcms_article_save_start</hook>
<hook>vbcms_article_save_end</hook>

For your question you would want to use the following hook:

<hook>vbcms_article_populate_start</hook>

Now you have to figure out how the output works. and find a way to do preg_match or preg_replace, or what ever code you may choose to us.