Change footer copyright wordpress

When i change footer text from gui doesn't change and i can't change it from code manual, am tried to change it from functions.php or disable it but i can't. how to disable or edit footer? and this footer code

        <?php
        /**
         * After main part - action
         */
        do_action('kleo_after_main');
        ?>

    </div><!-- #main -->

    <?php get_sidebar('footer');?>

    <?php 
    /**
     * After footer hook
     * @hooked kleo_go_up
     * @hooked kleo_show_contact_form
     */
    do_action('kleo_after_footer');
    ?>

</div><!-- #page -->

<?php
/**
 * After page hook
 * @hooked kleo_show_side_menu 10
 */
do_action('kleo_after_page');
?>

<!-- Analytics -->
<?php echo sq_option('analytics', ''); ?>
<?php wp_footer(); ?>

via Chebli Mohamed