codeigniter issues with DB and special characters

Ok so far i have tested and found this is the problem with this special char

%ca , it output and stores it on my mysql as ?

and when i try to make the output of it from mysql it stores it also on the value as ?

instead of %ca any ideas or help on this

i have my db mysql and all codeigniter config set to UTF-8 and db utf8_unicode_ci and also teste on uft8_general_ci