use strict;
use XML::Twig;

my $twig = new XML::Twig(
					
					twig_handlers => {
	sec => sub { $_->set_gi('section') }, #change the element 
									 },
										keep_encoding => 1,
										keep_spaces => 1,
										pretty_print => 'indented' #print format
);

$twig->parsefile('1.xml');