config = $config; } public function render() { $i=0; $output = ''; foreach(array_keys($this->config) as $tab_name) { $active_class = $i == 0 ? ' active_tab' : ''; $output .= '' . $tab_name . ''; $i++; } return $output; } public function i($data) { return strtolower(str_replace([' ', '/'], '_', $data)); } }