echo a variable with controller in prestashop 1.5

[anddam]

Salam every one

my english is not well

i develop a module of payment that have a controller named validation.php

this validation.php validate payment and it has two status

the first if the payment is valide it must view ok-ok-ok-ok

and the second if the payment is not valid it must view no-no-no-no

in the web page, it must view this

ok-ok-ok-ok

or

no-no-no-no

this string must be viewed in page like a simple echo without html tags

i used the variable content_only => true but it view in page source some tags that i dont need.

i hope that my question was clearly explained