Can the CKEditor show some html while saving it as something else?

Hi all,

I'd like to adapt my CKEditor so that when editing an image or other object it will show something like this in the editor view

<figure style="float: left">
  <img src="sample.jpg" />
  <figcaption>Caption</figcaption>
</figure>

On save I'd like to transform this part to something else, for example

<node id=3 />

Does the CKEditor have any support for this, maybe through Widget, dataProcessor, or otherwise?