Put limit on line breaks using nl2br()

function nl2br_limit($string, $num){

    return preg_replace('/\n/', '<br/>', preg_replace('/(\s{'.$num.'})\s+/','$1', $string));
    }

http://stackoverflow.com/questions/3027277/php-nl2br-limit-x-amount
http://stackoverflow.com/users/365047/kr1zmo