How to run shortcode in custom fields
Using this code into your theme’s files you will be able to run shortcodes into custom fields. What you need to do is apply this code in the file of your theme according on where you want to show shortcode; for example in index.php if you want to show it in the home page; single.php if you want to display it in article page…
<?php echo apply_filters('the_content', get_post_meta($post->ID, 'WPCODESHORTCODE', true)); ?>
Replace WPCODESHORTCODE with the name of custom fields where you want to show shortcode. Use the shortcode as meta value of custom fields!
Thanks to Wprecipes