title: Add text for specific product category in Woocommerce
body: <p>I'm trying to add some text only on the specific products of determinate category in <code>woocommerce</code>, I tried to add this code in <code>plugins/woocommerce/single-product/meta.php</code> but don't work:</p>
  
  <pre><code>if (is_category('box-mod') || has_category('box-mod',$post-&gt;ID)) {
      echo "Message: available on march";
  }
  </code></pre>