How to stop TinyMCE to delete the span tags?

问题

Here in my work, the previous programmer decided to use the wonderful TinyMCE on the company website. One of the thousands of problems I'm having is:

If the original text have any span tag, when I press the backspace to delete a line (p tag only), all span tags are deleted from the text.

This error is much more specific than the other. I can delete anything, character or tag (including the p tags), using the delete button and nothing happens. If I delete anything using the backspace button, nothing happens too. But if I delete any p tag (even if it was created during the editing of the text), using the backspace, all span tags are deleted.

I'm looking everywhere a way to solve this problem, because the client is not able to delete a row without losing all the markings of the text, which are made by CSS applied in span tags. E.g.,

<p>
   <span id="org_2" class="apoloP" onClick="myFunction(this.id);">
        TEXT
   </span>
</p>

Does anyone know how I can do to stop TinyMCE delete my text, beyond what is necessary?

It is not only when the original text has a span tag. When the TinyMCE creates a span tag itself (if to underline the selected text, for example), if I delete a p tag, all span tags created also disappear.

回答1:

Solution: Despite all tell me not to use version 4 because is still in beta, was this version that solved my problem.
The bug does not occur in version 4.

回答2:

Looks like you should have a closer look at the tinymce setting valid_elements and valid_children. Make sure spans are valid elements and can be children to paragraphs.

来源：https://stackoverflow.com/questions/16346562/how-to-stop-tinymce-to-delete-the-span-tags