Let's assume you have module A in which you'd like to place a link to module B, and you also want this link to set filters in module B.
To do this, you'll have to use following code:
$filters = array('query_string' => 'filter', 'filters' => array('a_id' => $A->getId())); echo link_to('Go and apply filter', 'b/index?'.http_build_query($filters));
Following this link, user will visit module B with 'a_id' filter field set to $A->getId()
No csrf_token is needed - it's a simple solution to crosslink your symfony admin modules.