LinkCrawler

function autoblank($text) {

$return = str_replace(‘<a href = ‘, ‘<a target = “_blank” href = ‘, $text);

$return = str_replace(‘<a target = “_blank” href = “http://domain.com’, ‘<a href = “http://domain.com’, $return);

$return = str_replace(‘<a target = “_blank” href = “#’, ‘<a href = “#’, $return);

$return = str_replace(‘ target = “_blank”>’, ‘>’, $return);

return $return;

}

add_filter(‘the_content’, ‘autoblank’);

via External links in new tab/window: WordPress.