Plugin – Custom Fields Creator:jQuery shortcode in textarea

Well I’ve been doing some searching around and it seems that I need to use the do_shortcode function from the codex. I’ve tried a number of different ways suggested by people in blogs and forum posts, but none of them seem to work in my code. I have a custom field that outputs a styled div for customers testimonials on a page template with the following code in:

<?php
$testimonial = get_post_meta($post->ID, 'testimonial', true);
foreach($testimonial as $testimonial){
echo '<div class="testimonial">';
echo '<p>' . $testimonial['testimonial-text'] . '</p>';
echo '<p class="testimonialname">' . $testimonial['testimonial-name'] . '</p>';
echo '</div>';
}
?>

I think I need to use the
echo do_shortcode('[iscorrect]'.$text_to_be_wrapped_in_shortcode.'[/iscorrect]');
from the codex as I have an [expand][/expand] shortcode that creates a collapsible div when there is a lot of testimonial text.

Can anyone help me as to how to correctly insert this into my code so that it is only used when the shortcode is present in the custom field value?

Any help very greatly appreciated.