google map issue

Hi ,I have attached library google map v3 API and now i need to fetch Latitude and longitude from database which I have calculated and which should display by serial  Every time dynamically.I used marker but it's not displaying .Does anyone can help me to solve this problem?
controller:
function Googlemaps($serial)
    {
        // Load the library
            $this->load->library('googlemaps');
            $config['minifyJS'] = TRUE;
            //$config['center_lat_long']= '030.259565,-81.61062';//30.25953,-81.611
            //$config['zoom']=16;
            
        // Initialize our map. Here you can also pass in additional parameters for customising the map
            $this->googlemaps->initialize($config);

            $coords=$this->dashboard_model->googlemaps($serial);var_dump($coords);            
            foreach($coords as $coordinate)
            {
                $marker=array();
                $lat1=$coordinate->cycle_19_INT.(substr($coordinate->cycle_20_INT, 0, 2)+(substr($coordinate->cycle_20_INT, 2).".".$coordinate->cycle_21_INT)/60);
                $lat2=str_replace($coordinate->cycle_22_INT,'-',$coordinate->cycle_22_INT).(substr($coordinate->cycle_23_INT, 0, 2)+substr((substr($coordinate->cycle_23_INT, 2).".".$coordinate->cycle_24_INT)/60,0,7));                
                $lat=$lat1.','.$lat2;

                $marker['position']=$lat;var_dump($lat);
                $this->googlemaps->add_marker($marker);
            }
            
        // Create the map
            $this->data=array();
            $this->data['map'] = $this->googlemaps->create_map();            
        // Load our view, passing the map data that has just been created
            $this->load->view('dashboard/dashboard_googlemap_view', $this->data);

    }
model:
function googlemaps($serial)
    {
        
        $return=array();
        $query=$this->db->select('cycle_19_INT,cycle_20_INT,cycle_21_INT,cycle_22_INT,cycle_23_INT,cycle_24_INT')->from('cycles')->where(array('cycle_serial'=>$serial))->limit(1)->order_by('cycle_timestamp','DESC')->get();
        
        if($query->num_rows()>0)
        {
            foreach($query->result() as $row)
            {
                array_push($return,$row);
            }
        }
        return $return;    
    }

view:
<?php echo $map['javascript'];?>      <?php echo $map['mapdiv']; ?>