use array_key_exists and ArrayHelper switch a subArray

like switch

/**
 * @return array of type
 */
public static function itemsAilas($type){
    $items = [
        'occupation'=> [
            self::OCCUPATION_DOCTOR     => 'แพทย์',
            self::OCCUPATION_NURSE      => 'พยาบาล',
            self::OCCUPATION_PHARMACY   => 'เภสัชกร',
            self::OCCUPATION_DENTIST    => 'ทันตแพทย์',
            self::OCCUPATION_HEALTH     => 'นักวิชาการสาธารณะ',
            self::OCCUPATION_OTHER      => 'อื่นๆ '
        ],
        'office'=>[
           self::OFFICE_PRIVATE => 'ภายใน รพ.ขอนแก่น',
           self::OFFICE_PUBLIC  => 'ภายนอก'
        ],
        'choice'=>[
            self::CHOICE_ONE    => 'น้อยที่สุด',
            self::CHOICE_TWO    => 'น้อย',
            self::CHOICE_THREE  => 'ปานกลาง',
            self::CHOICE_FOUR   => 'มาก',
            self::CHOICE_FIVE   => 'มากที่สุด'
        ],
        'type'=>[
         self::TYPE_CONTENT => 1,
         self::TYPE_CONTEST => 2,
         self::TYPE_SEMINAR => 3,
         self::TYPE_ICT => 4,
         self::TYPE_FOOD => 5,
         self::TYPE_NEWS => 6,
         self::TYPE_REGISTER => 7,
         self::TYPE_ENVIRONMENT => 8,
         self::TYPE_AUDIOVISUAL => 9,
         self::TYPE_LOCATION => 10,
         self::TYPE_OVER_ALL => 11
       ]
    ];
    return array_key_exists($type, $items) ? ArrayHelper::getValue($items,$type) : [];
}