Yes! This can be done within the mobile app.

1. Open the mobile app.
2. Open the message you would like to forward by selecting the info button to the right.
3. In the lower right corner, select More.
4. Select Share.
5. Select the option to send as a text message. The app will open a new text message on your phone and attach the file as an MP3.
6. Send the text as you normally would from your phone.