@DIV
$Column['board_body'] = htmlspecialchars($Column['board_body']);

$pattern = "(https?:\/\/[-_.!~*'\(\)a-zA-Z0-9;\/?:\@&=+\$,%#]+)";
$replacement = "<A href=\"\\1\" target=\"_blank\">\\1</A>";
$body_main = mb_ereg_replace( $pattern, $replacement, $Column['board_body'] );

$Column['board_title'] = htmlspecialchars($Column['board_title']);
$Column['board_name'] = htmlspecialchars($Column['board_name']);
@END

$body_main を表示部分に使い、$Column['board_body'] を変更用隠しデータとして使う