How-to : SaveFormat.Html and Mergefields

Is there any way to detect Doc fields during saving as SaveFormat.Html, and insert a custome Html tag in the document generated ?
For exemple, I would like to export this kind of .Doc document :
Text { MERGEFIELD data } Text
To something like that :

Thanks for your request. There is no such option. However, you can achieve this by replacing mergefield in your source document with placeholders and then after converting to HTML replace placeholders with tags you would like to see at place of mergefields.
The technique should be similar to the one described here:
Please let me now if you need more assistance, I will be glad to help you.
Best regards,