XSLT with not nestable tags

I have an XML document which contains both structure (section) tags and display tags (columns):

<document>
  <new-column/>
  <section1>
    text
  </section1>
  <section2>
    text
    <new-column/>
    text
  </section2>
</document>

I am writing an XSLT to display this as HTML, and the logical way would be to use a div tag to display the text in separate columns, so I'd have to convert new-column into div. However, the div requires a closing < /div> tag, with all the comprising elements in between, but then the document would not be well-formed, with < section> and < new-column> being wrongly nested. One solution would be to add closing < /section> tags like this:

<document>
  <new-column>
    <section1>
      text
    </section1>
    <section2>
      text
    </section2>
  <new-column/>
  <new-column>
    <section2>
      text
    </section2>
  <new-column/>
</document>

However, I was wondering if anyone has a better idea, such as adding text to a div section on the fly, or perhaps using a different solution for multiple column (and multiple pages) display. TIA