[merk]

It is (afaik) possible to do what you want, except its complex. The way I see you being able to do it is using the bbcode_create hook to modify the $this->tag_list array to modify the replacement html of the bbcode as the bbcode parser starts up.

It would look something like below, but note that i did it based on the tag example [newsimg]url[/newsimg] not [newsimg=url]text[/newsimg]. To do the second one, change no_option to option. I havent tested this and it could break the bbcode parser (with either setting).

PHP Code:

if(STYLEID == XX)
{
$this->tag_list['no_option']['newsimg']['html'] = '<a href="{param}" target="_new">{param}</a>';
}