如果分类法存在，Wordpress

Hello I was wondering if someone could help me out. I am creating a single.php page with custom meta data. I would like the custom post type associated with the single.php to display this custom meta. i would like to have an if statement so that only specific meta data will display if the custom post type is associated with a specific taxonomy.

<?php
if(taxonomy_exists('websites')){
     echo ' get_post_meta($post->ID, 'Website_URL', true)';
}
else{

echo ' get_post_meta($post->ID, 'Website_URL',false)';

}
?>

but would like this to be enclosed in a ul li like:

<ul class='post_meta'>
<li><span class='post-meta'>name:</span> <?php echo get_post_meta($post->ID, 'name', true); ?></li>
<li><span class='post-meta-key'> Description:</span> <?php echo get_post_meta($post->ID, 'short', true); ?></li>
<li><span class='post-meta-key'>  <?php
if(taxonomy_exists('websites')){
     echo ' get_post_meta($post->ID, 'Website_URL', true)';
}
else{

echo ' get_post_meta($post->ID, 'Website_URL',false)';

}
?>     </li>
</ul>

Thank you in advanced :)

Not sure if i understand you at 100%, so i'm providing 2 versions of the code - feel free to try them both.

Version 1: Checks if the post has been assigned to a term "webdesign" of the taxonomy "category":

if ( has_term('webdesign', 'category') ) {
    $website = get_post_meta(get_the_ID(), 'Website_URL', 1);
    echo '<li>' . $website . '</li>';
}

Version 2: Checks if the post has any terms of the taxonomy "webdesign":

$terms = wp_get_object_terms(get_the_ID(), 'webdesign');
if($terms && is_array($terms)) {
    $website = get_post_meta(get_the_ID(), 'Website_URL', 1);
    echo '<li>' . $website . '</li>';
}

EDIT:

Version 3: Use the following code to display the website URL if the post has been assigned to a term "webdesign" of the taxonomy "portfolios":

if ( has_term('webdesign', 'portfolios') ) {
    $website = get_post_meta(get_the_ID(), 'Website_URL', 1);
    if( $website ) {
        echo '<li>' . $website . '</li>';        
    }
}