function getDistrict()
 {
     $segs = $this->uri->segment_array();
     $provinceId = $segs[3];
     $districts = District::getNameAndId($provinceId);
     $allDistricts = "";
     foreach ($districts as $districts) {
         $allDistricts .= $districts->id;
         $allDistricts .= "+";
         $allDistricts .= $districts->Name;
         $allDistricts .= "_";
     }
     echo $allDistricts;
 }