Sure you can, this is Perl you're talking about :-)

To give you a more specific answer we would need some more info, like:
Is the files on a local server or out there on the web?
Do the format of the hidden tags always have a known format?
Can they be multi-line?

 Some links to get you started:
HTML Crawler
How do I remove HTML from a string?
matching comments


/brother t0mas

In reply to RE: searching for hidden tags into html files by t0mas
in thread searching for hidden tags into html files by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
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