to hide button or not in html

I want to make a link or button visible or hidden based or guest view or member is logged in.

does this <bx_if:logged_in> exists?? and can i just put in around a div in a html file.

Any help is welcome :-)

Take a look at the Page Access Control module (it is a part of the basic Dolphin install) for such tasks.  If this is part of the menu system, then the PAC module can handle it.  It can also control view of blocks on a page and you can enter specific URL that can be blocked.

thank you GG. i had a look at that but the pages that i need to change are from AndrewP listing module and that doesn't come up as a page. I can only do this in the html file.

I suggest asking Andrew then.  If you can do simple edits, he may have an answer that you can implement.