Ok, I'm not experienced in this, but I have a suggestion.
You could use str_word_count to get an array of the words they entered, like so:
// This returns the number of words as an integer
$numWords = str_word_count($nameOfTextBox);
// This returns the words as an array
$words = str_word_count($nameOfTextBox, 1);
$halfWords = $numWords / 2;
// in your first column
for ($i = 0; $i < $halfWords; $i++)
{
echo $words[$i];
}
// in your second column
for ($i = $halfWords; $i < $numWords; $i++)
{
echo $words[$i];
}
I've never done this, so I can't promise it will work. But it's worth a shot.