title: Filtering Custom Fields in Wordpress Plugin Dev
body: <p>I'm wondering if it's possible to add filters and actions on Custom Fields in a post?</p>
  
  <p>I have a plugin that extracts all <code>&lt;a&gt;</code> tags and converts them into trackable objects. This works great for the content and excerpt but I can't figure out how to filter the Custom Fields.</p>
  
  <p>I've tried calling the below:</p>
  
  <pre><code>add_filter('the_meta', 'function_name', $priority)
  </code></pre>
  
  <p>which I read should work but it doesn't seem to do anything.</p>
  
  <p>Any help would be appreciated.</p>