public function get_table_short_tag()
    {

        if (empty($this->table_name)) return false;

        $tmp = null;

        if (strpos($this->table_name, '_') !== false) {
            $tmp = explode('_', $this->table_name);
        }

        if (!empty($tmp)) {
            foreach ($tmp as $val) {
                $this->table_short_tag .= strtolower(substr($val, 0, 1));
            }
        } else {
            $this->table_short_tag .= strtolower(substr($this->table_name, 0, 1));
        }

        $this->tpl_replacements['table_short_tag'] = $this->table_short_tag;

        return true;
    }