How to Change the Date format in jQuery Datatable AJAX call

$query = $this->db->select("IsFullAccess");
		$this->db->from('UserMst');
		$this->db->where($where);
		$query=$this->db->get();
		$result=$query->row();
		$data = $this->input->post();
        $keyword = trim($data["search"]["value"]);
		$query=$this->db->select("*");
		$this->db->from('houselr');
		$this->db->where('is_delete', 0);
		$this->db->order_by('auto_id', 'desc');
		if($this->session->userdata('IsAdmin')!=1 && $is_full_access!=1){
			$this->db->where('user_id',  (int)$this->session->userdata('AutoID'));
		}
        if(!empty($keyword)) {
			$this->db->group_start();
			$this->db->like('ref_no', $keyword);
			$this->db->group_end();
		}
		$this->db->limit($data['length']);
		$this->db->offset($data['start']);
		$query=$this->db->get();
		$lrList= $query->result();
		$lrList = json_decode(json_encode($lrList),true);
		foreach ($lrList as $key => $value) {
			$ExpectedDate =$value['ExpectedDate'];
			$newDate = date("Ymd", strtotime($ExpectedDate));
			if (!empty($newDate)) {
				$lrList[$key]['expecteddate'] = $newDate;
				
			}
		}
		$draw = $this->input->post('draw');
		$total = $this->db->where($where)->count_all_results('houselr');
		$totalFilter = count($lrList);
		$contents = array("msg"=>"data found",
			"data"=>$lrList,
			"draw"=>$draw,
			"recordsTotal"=>$total,
			"recordsFiltered"=>$total
		);