SimplePie-WP-Filter Single Post by WP ID

<?php
/*
  SimplePie Wordpress - Display 1 post by filtering it's ID
  [link]http://www.worldoweb.co.uk/2012/display-wordpress-posts-on-another-wp-blog
*/
?>
<ul class="rss-items" id="wow-feed">
<?php
if ($maxitems == 0){
    echo '<li>No items.</li>';
}
else {
    foreach ($rss_items as $item):
        $id = $item->get_id(); //Get's IDs of posts
        //echo var_dump($id)  Uncomment, save and reload to display ID's

        //Replace below with your ID
        if ($id === 'http://www.worldoweb.co.uk/?p=5941') {?>

        <li class="item">
            <span class="rss-image">
              <?php echo '<img src="' . get_first_image_url($item->get_content()) . '"/>';?>
            </span>
            <span class="data">
              <h5>
                <a href='<?php echo esc_url($item->get_permalink());?>'
                title='<?php echo esc_html($item->get_title());?>'>
                    <?php echo esc_html($item->get_title());?></a>
              </h5>
            <span class="date-image">&nbsp;</span>
                <small><?php echo $item->get_date('F Y');?></small>
                <span class="comment-image">&nbsp;</span>
                <small><?php $comments = $item->
                        get_item_tags('http://purl.org/rss/1.0/modules/slash/', 'comments');?>
                    <?php $number = $comments[0]['data'];?>
                    <?php if ($number == '1') {
                            echo $number . "&nbsp;" . "Comment";}
                            else {
                            echo $number . "&nbsp;" . "Comments";}?>
                </small>
                <p><?php echo $item->get_description();?></p>
            </span>
        </li>
        <?php } //end if?>
        <?php endforeach;?>
        <?php } //end if;?>
</ul>