สอบถามครับ เรื่องการค้นหา แล้วแสดง ใน list menu ครับ เป็น modal bootstrap ครับ

<div class="row">
			<div class="col-md-4 text-center">
			  <label class="control-label" for="itemtypeid"></label>  
			  <div>
				<select name="ddlLeft[]" class="form-control" id="ddlLeft" size="10" multiple style="width:150px;">
					<?php 
						$selitem = "select ITEMID,ITEMNAME,ITEMGROUPID from INVENTTABLE";
						$qrit = mssql_query($selitem);
						while($item = mssql_fetch_assoc($qrit))
						{ ?> 
						<option value="<?php echo $item['ITEMID']; ?>"><?php echo iconv('TIS-620','UTF-8',$item['ITEMNAME']);  ?></option>
						<?php 
						}
					?>			
				</select>
			  </div>
			  </div>
			  	  
			  <div class="col-md-4"><br><br>
	   	  		<input type="button" class="btn btn-default" name="MoveRight" value="-->" style="width: 100px;" 
	   	  		onClick="MoveOption(this.form.ddlLeft, this.form.ddlRight)"><br><br>
		        <input type="button" name="MoveLeft" class="btn btn-default text-center" value="<--" style="width: 100px;" 
		        onClick="MoveOption(this.form.ddlRight, this.form.ddlLeft)">
		   	  </div>
		   	  
			  <div class="col-md-4">
			  <label class=" control-label" for="itemtypename"></label>  
			  <div>
				<select name="ddlRight[]" id="ddlRight" size="10" class="form-control" multiple style="width:150px;">
     			<input name="vendorid" id="vendorid" value="" type="hidden">
      			</select>
			  </div>
			</div>
        
        </div>
        </div>
      </div>
      <div class="modal-footer">
      	<div class="col-md-12" align="center">
			<input class="btn btn-primary" type="submit" id="btnsaveitemtype" name="btnsaveitemtype" value="บันทึก">
	 	</div>
      </div>
	 </form>
    </div>

  </div>
</div>

if(!empty($_GET['keyword']))
{
  $key =  $_GET['keyword'];     
  $sql = "select ITEMID,ITEMNAME,ITEMGROUPID from INVENTTABLE where ITEMID like '%$key%' or ITEMNAME like '%$key%' or ITEMGROUPID like '%$key%' order by ITEMID"; 
  echo $sql;
}

$('#searchitem').click(function()
	{
		//alert('dd');
		var keyword = $('#keyword').val();
		$.ajax({
				url: "search_itemmodal.php",
				data: "keyword="+keyword,
				type: "get",
				success: function(result)
				{
					alert(result);
					$(".modal-content").html(result);
				}
			});
	});