Navigation breaking

Hi,

I'm using some code that I've used before (and it worked) to create my navigation. Within this code, I wanted to exclude any that had 1 in the is_feature field.

However, when I put the code in like:

<?php foreach ($allIndex_homeRecords as $categoryRecord): ?>
<?php if(!$categoryRecord['is_feature']): ?>
<?php echo $categoryRecord['_listItemStart']; ?>
<span <?php if($thisPage == "index"){echo 'class="currentpage"';} ?>><a href="<?php echo $categoryRecord['_link'] ?>"><?php echo $categoryRecord['name'] ?></a></span>
<?php echo $categoryRecord['_listItemEnd'] ?>
<?php endif; ?>
<?php endforeach; ?>

It breaks the navigation (please find attached how_nav_is_breaking.png and how_nav_is_breaking_source.html).

If i put the code in like:

<?php foreach ($allIndex_homeRecords as $categoryRecord): ?>
<?php echo $categoryRecord['_listItemStart']; ?>
<span <?php if($thisPage == "index"){echo 'class="currentpage"';} ?>><a href="<?php echo $categoryRecord['_link'] ?>"><?php echo $categoryRecord['name'] ?></a></span>
<?php echo $categoryRecord['_listItemEnd'] ?>
<?php endforeach; ?>

The navigation is as it should be (please find attached how_nav_should_be.png and how_nav_should_be_source.html), but the navigation displays the 'features', when it shouldn't.

So you can understand more, if you go to: http://jubileehighschool.no-ip.org/curriculum.php?Curriculum-1-1, you will see two blocks on the right (feature and feature2), now if you hover over Curriculum 1 in the nav, you will also see feature and feature 2 there, but I don't want them to be displayed in the nav.