How to add new tags in bbcode (CKEditor)?

I'm using CKEditor whit bbcode plugin and I need to add custom tags, like: spoiler and link to site user. Tags spoiler work's like blockquote: click button and get code. I'd copy blockquote/plugin.js and changed all "blockquote" to "spoiler" and "quote" to "spoil". Then I'did add extraPlugins : 'spoiler' to config and button on toolbar. It's work's, but if click blockquote button, selected text, i have: [ quote ]some text[ /quote] but when I click my new button, I have:

<p>
    <spoiler>
    <p>
        some text</p>
    </spoiler></p>

=( doesnt work bbcode. Must bee like this:

[spoiler]some text[/spoiler]

And another button I need - link to user. It must work like that: after click show dialog with search field (ajax not a problem). When user choose some user and click "OK", in code add link. Something like this:

[user=1]Admin[/user]

1 - id of user, Admin - his name.
May be someone did plugin's, which worked like this.

P.S. Sorry for my ugly English.