I personally enjoy HTML::Scrubber.

It allows you to create a pretty detailed profile of what HTML you want allowed/disallowed.

From the docs:

(Turns out JavaScript is turned off by default. See the script method for more info.)

#!/usr/bin/perl -w
    use HTML::Scrubber;
    use strict;
                                                                      
+      #
    my $html = q[
    <style type="text/css"> BAD { background: #666; color: #666;} </st
+yle>
    <script language="javascript"> alert("Hello, I am EVIL!");    </sc
+ript>
    <HR>
        a   => <a href=1>link </a>
        br  => <br>
        b   => <B> bold </B>
        u   => <U> UNDERLINE </U>
    ];
                                                                      
+      #
    my $scrubber = HTML::Scrubber->new( allow => [ qw[ p b i u hr br ]
+ ] ); #
                                                                      
+      #
    print $scrubber->scrub($html);                                    
+      #
                                                                      
+      #
    $scrubber->deny( qw[ p b i u hr br ] );                           
+      #
                                                                      
+      #
    print $scrubber->scrub($html);                                    
+      #
[download]

Hope this helps!