You can obfuscate more than one block of HTML code. You need to enclose each block in inside <?php HObfus_begin(); ?> and <?php HObfus_end(); ?> as shown below.

<?php HObfus_begin(); ?>
<div>
	<?php echo "This is HTML code #1"; ?> 
</div>
<?php HObfus_end(); ?>

<?php HObfus_begin(); ?>
<div>
	<?php echo "This is HTML code #2"; ?> 
</div>
<?php HObfus_end(); ?>

<?php HObfus_begin(); ?>
<div>
	<?php echo "This is HTML code #3"; ?> 
</div>
<?php HObfus_end(); ?>

Don't forget to include HObfus.inc.php to the PHP page. To do so, use the require_once() function like shown below.

<?php require_once("PATH-TO-HObfus.inc.php"); ?>