use code tag for generating new MYCODE

[CivilEA]

Hello;

I want to generate new MYCODE that when user use it, first a specified picture show and then expression between MYCODE tag put in code tag, please see example:

Regular Expression
\[test\](.*?)\[/test\]

Replacement
<img src="http://test.com/test.png"/>
<br>

$1

Result:
I want to put $1 between [ code] [ /code],

what can I do for doing this?