$VAR1 = [
          {
            'page' => 'main',
            'chap' => 'About'
          },
          {
            'page' => 'main',
            'chap' => 'Contact'
          },
          {
            'page' => 'sub',
            'chap' => 'About'
          },
          {
            'page' => 'sub',
            'chap' => 'Contact'
          }
        ];