#!/usr/bin/env perl

use strict;
use warnings;

my $re = qr{
    <div \s+ class="sectionHeading">REMOVE_THIS.*?</div>\s+
    <div \s+ class="sectionContent">.*?</div>\s+
}msx;

#my $html = do { local $/; <DATA> };

#$html =~ s/$re//;

opendir(my $dh, ".") or die "$!";
my @files = grep { s/\././g < 2 } <*.html>;
closedir $dh;

for my $file (@files) {
	local $/ = undef;
    open my $fh, "<", $file or die "$!";
    my $content = <$fh>;
    $content =~ s/$re//;
	print $content;
    close $fh;
}