Finaly implemented with ansel/lib/Gallery.php 1.103 and 
framework/Share/Share.php 1.120

Assigning galleries to categories has already been implemented.

Agreed, using Horde's CategoryManager would be nice.



But I don't think this should be coupled with permissions. If you need 
permissions, I'd suggest to create the categories as parent galleries 
instead and assign permissions as appropriate.



The copyright text can already be added with the watermark feature.

To add a category system, so we can list galleries by their content 
(sub)categories. For example sports, arts.... Like on 
http://www.webshots.com/g/  (the left categories menu)



It will be nice that categories are connected to the prmisssion system 
so we can assign right which user/group can add galleries in this 
category.



And another thing would be nice. A method to add copyright text. For 
example all images can be in the left low corner marked with username 
and installatn name.

I am not sure what you talk about. Can you elaborate?

Allow Ansel galleries to be categorised by selecting category when 
uploading/editing it. The categories should be child of the parent 
"ansel" API permisson.