How do I overwrite Facet API tokens for active items?
I didn't need the "Facet API Bonus" module, I wrote a module to implement THEME_facetapi_link_active (included in facetapi.theme.inc)
then i simply replaced the label's text using the function str_replace like this:

$variables['text']=str_replace("Price » Amount (decimal)","Price",$variables['text']);