$text = eregi_replace("^[ url]http://[ /url]([^ ,rn]*)","[ url]http://\\1[ /url]",$text);
$text = eregi_replace("^[ url]https://[ /url]([^ ,rn]*)","[ url]https://\\1[ /url]",$text);
$text = eregi_replace("^[ url]ftp://[ /url]([^ ,rn]*)","[ url]ftp://\\1[ /url]",$text);
$text = eregi_replace("^[ url]www.[ /url]([^ ,rn]*)","[ url]http://www.\\1[ /url]",$text);
$text = eregi_replace("([ rn])[ url]http://[ /url]([^,rn]*)","\1[ url]http://\\2[ /url]",$text);
$text = eregi_replace("([ rn])[ url]https://[ /url]([^,rn]*)","\1[ url]https://\\2[ /url]",$text);
$text = eregi_replace("([ rn])[ url]ftp://[ /url]([^,rn]*)","\1[ url]ftp://\\2[ /url]",$text);
$text = eregi_replace("([ rn])[ url]www.[ /url]([^,rn]*)","\1[ url]http://www.\\2[ /url]",$text);
$text = eregi_replace("\\[email\\]([^\\[]*)\[/email\\]", "<a href=\"mailto:\\1\">\\1</a>",$text);
$text = eregi_replace("\\[ url=([^\\[]*)\\]([^\\[]*)\\[/url\\]", "<a href=\"\\1\" target=\"_blank\">\\2</a>",$text);
$text = eregi_replace("\\[ url=http://([^\\[]+)\\]([^\\[]*)\\[/url\\]", "<a href=\"http://\\1\" target=\"_blank\">\\2</a>", $text);
$text = eregi_replace("\\[url\\]www.([^\\[]*)\\[img\\]www.([^\\[]*)\\[/img\\]\\[/url\\]","<a href=\"http://www.\\1\" target=\"_blank\"><img src=\"http://www.\\2\" border=\"0\"></a>",$text);
$text = eregi_replace("\\[url\\]http://([^\\[]*)\[img\\]http://([^\\[]*)\\[/img\\]\[/url\\]","<a href=\"http://\\1\" target=\"_blank\"><img src=\"http://\\2\" border=\"0\"></a>",$text);
$text = eregi_replace("\\[img\\]http://([^\\[]*)\\[/img\\]","<img src=\"http://\\1\" border=\"0\">",$text);
$text = eregi_replace("\\[url\\]www.([^\\[]*)\\[/url\\]","<a href=\"http://www.\\1\" target=\"_blank\">\\1</a>",$text);
$text = eregi_replace("\\[url\\]([^\\[]*)\[/url\\]","<a href=\"\\1\" target=\"_blank\">\\1</a>",$text);
$text = eregi_replace("\\[u\\]([^\\[]*)\\[/u\\]", "<u>\\1</u>", $text);
$text = eregi_replace("\\[b\\]([^\\[]*)\\[/b\\]", "<b>\\1</b>", $text);
$text = eregi_replace("\\[i\\]([^\\[]*)\\[/i\\]", "<i>\\1</i>", $text);