Hi Burt
Wordpress determine the content in the shortcode by the first end tag. For example,

[a]hello [a]world[/a] another[/a]

the first a shortcode end with the first [/a].  The result is the right string will not be considered a shortcode.

So the issue with columns is that one cannot nest columns of the same type as per your example.  We do not know a way to get around this by php as this is how WP behaves as a core function.

But you can try use


if it turns out you really need to nest (and are not just testing to find holes!)

I think this matter has come up once or twice on the forum in the past as well.

So an example would be:

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Morbi in sem quis dui placerat ornare. Pellentesque odio nisi, euismod in, pharetra a, ultricies in, diam. Sed arcu. Cras consequat. Vivamus magna. Cras in mi at felis aliquet.

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