不知道如何创建一个if语句，说明<iframe> else else else

I am in Magento, but I figure this can be done with normal PHP. Maybe I am wrong. I am inexperienced when it comes to PHP.

I have an issue where I need to kill an iframe from trying to display in a dropdown. But it still needs to display when you get to that specific landing page. So I can't kill it everywhere, just on the dropdown. So what I need to write is when that iframe does try to show up in the dropdown, it gets replaced with normal text.

I tried finding an answer to this but no luck.

Thank you for your time in advance.

This is the code being used for that specific dropdown. There is no if statement running right now to kill it. I tried a couple of things that didn't come close to working.

<?php
$category = Mage::getSingleton('catalog/layer')->getCurrentCategory();
$category = Mage::getModel('catalog/category')->load(54);
$categories = $category->getCollection()
    ->addAttributeToSelect(array('name', 'thumbnail', 'description'))
    ->addAttributeToFilter('is_active', 1)
    ->addIdFilter( $category->getChildren() );
$categories->getSelect()->order('RAND()');
$categories->getSelect()->limit(1);
?>
<?php foreach ($categories as $category): ?>
<div>
    <a href="<?php echo $category->getUrl(); ?>">
        <img alt="<?php echo $category->getName(); ?>" src="<?php echo Mage::getBaseUrl('media') . 'catalog' . DS . 'category' . DS . $category->getThumbnail() ?>" alt="<?php echo $this->htmlEscape($category->getName()) ?>" style="width: 100%; max-height: 240px; box-shadow: 0px 2px 4px #aaa;-ms-box-shadow: 0px 2px 4px #aaa;-moz-box-shadow: 0px 2px 4px #aaa;-webkit-box-shadow: 0px 2px 4px #aaa;border: 1px solid #F7EBD2;" />
    </a>
    <br />    
    <h3>Spotlight Watch</h3>
    <p>
    <?php
        $sdesc = $category->getDescription();
        $sdesc = trim($sdesc);
        $limit = 300;
        if (strlen($sdesc) > $limit) {
            $sdesc = substr($sdesc, 0, strrpos(substr($sdesc, 0, $limit), ' '));
        }
    ?>
    <?php echo $sdesc."..."; ?>
    </p>
    <a href="<?php echo $category->getUrl(); ?>" class="go">View <?php echo $category->getName(); ?> Watches...</a>      
</div>
<?php endforeach; ?>