//change url text to clickable links - autolink - by Wooya

$text = eregi_replace('([[:space:]()[{}])(((f|ht){1}t(p|ps)://)[-a-zA-Z0-9@:%_\+.~#?&//=]+)', '\\1<a href="\\2">\\2</a>', $text);

$text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_\+.~#?&//=]+)', '\\1<a href="http://\\2">\\2</a>', $text);

$text = eregi_replace('([[:space:]()[{}])([_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\.)+[a-z]{2,3})', '\\1<a href="mailto:\\2">\\2</a>', $text);

//change url text to clickable links - autolink - by Wooya