Just write a if statement using the get_post_meta
like this
<?php if(get_post_meta($post->ID, '_url', true)){?>
<p> Display some stuff.</p>
<?php } ?>
There is an example here http://codex.wordpress.org/Function_Reference/get_post_meta
Just write a if statement using the get_post_meta
like this
<?php if(get_post_meta($post->ID, '_url', true)){?>
<p> Display some stuff.</p>
<?php } ?>
There is an example here http://codex.wordpress.org/Function_Reference/get_post_meta