Tanya Form Validation

        // Set the character encoding in MB.
        if (function_exists('mb_internal_encoding'))
        {
            mb_internal_encoding($this->CI->config->item('charset'));
        }

 // file config.php
/*
|--------------------------------------------------------------------------
| Default Character Set
|--------------------------------------------------------------------------
|
| This determines which character set is used by default in various methods
| that require a character set to be provided.
|
*/
$config['charset'] = "UTF-8";