Hello Stanescu Mihai,
Unfortunately, you cannot customize the output that the HTML provider produces for now. We have planned to allow some options, but I am afraid such a great change is not on our to-do list.
If you need to generate the code you have added as an example, you would have to create your own format provider implementing IDocumentFormatProvider
in your desired fashion. This task would not be trivial, however If you decide to use this approach you can open a support ticket and we can send you the source code of our Html export provider that you should customize further.
If you have any other questions, feel free to get back to us.
All the best,
the Telerik team
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