php turn unicode http link into clickable

i have unicode link needed to be turn into links.

Is it possible to change unicode into clickable?

Currently i'm using this piece of code to turn link into clickable

function clickable_link($text)
{
$ret = ' ' . $text;
$ret = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a class=\"hrefLink\" href=\"\\2\" target=\"_blank\">\\2</a>", $ret);
$ret = preg_replace("#(^|[\n ])((www|ftp)\.[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a class=\"hrefLink\" href=\"h开发者_运维问答ttp://\\2\" target=\"_blank\">\\2</a>", $ret);
$ret = preg_replace("#(^|[\n ])([a-z0-9&\-_.]+?)@([\w\-]+\.([\w\-\.]+\.)*[\w]+)#i", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>", $ret);
$ret = substr($ret, 1);
return $ret;
} 

Any help would be deeply appreciated.

ah, i just added,

$ret = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#isu", "\\1<a class=\"hrefLink\" href=\"\\2\" target=\"_blank\">\\2</a>", $ret);
$ret = preg_replace("#(^|[\n ])((www|ftp)\.[\w\#$%&~/.\-;:=,?@\[\]+]*)#isu", "\\1<a class=\"hrefLink\" href=\"http://\\2\" target=\"_blank\">\\2</a>", $ret);
$ret = preg_replace("#(^|[\n ])([a-z0-9&\-_.]+?)@([\w\-]+\.([\w\-\.]+\.)*[\w]+)#iu", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>", $ret);

I just added u behind #is and it worked.