I really doubt if this is possible but I would like to filter a custom post type with Isotope based on the tag of the post and not the taxonomy.
I'm currently using
$terms = get_terms("taxonomy"); to filter CPT's but tags could be anything.
The reason why I would like to filter it this way is that the client want to show projects (CPT) on two pages. One for finished projects and one for planned projects. Within the finished projects page you should be able to filter the projects.
I could do this the easy way to create two different CPT's; one for planned projects and one for finished projects. But this way the client has to enter all the details of the project again once the planned project is finished.
If anyone knows how to filter CPT's by tags or has a creative solution that would be nice as I'm currently stuck based on my own WordPress knowledge.