How to separate the code from [controller] into [view]?

[eluser]chiquitta[/eluser]
I am new in Codeigniter!
I use PHPexcel to upload , read and insert data to my database
but i don't know how to use [view] i only use [model] and [controller]
i cant understand how to separate the code into [view].
so I did a stupid way to deal with, but it's very ugly without any css.
please help me!

Code:

function read()
{  
       $rows = array('id','sku','name','description','created_on','enabled');
       $KeyWord_sku =  'sku';  
       $KeyWord_mac =  'name';  
       $KeyWord_des =  'description';
    $fileName   = EXCELFILE_PATH.'MyExcel.xlsx';
    $filename = $_FILES['userfile']['name'];
       $Exsel_data  = $this->excel->read($fileName,$rows);  
       //$this->FilterExsel($Exsel_data,$KeyWord_sku);  
       $DB_data    =    $this->mexcel->selUsers();

       if(!empty($DB_data))
       {
   //$this->load->view('preview_form',$Exsel_data);
            $DataKeyArray   =  $this->getKeyValue($DB_data,$KeyWord_sku,$KeyWord_mac,$KeyWord_des);
            $dataChange     =  $this->dataChange($DB_data,$KeyWord_sku,$KeyWord_mac,$KeyWord_des);  
       }

    echo '<table border=1>
    <tr>
    <th colspan=4>'.$filename.'</th>
    </tr>
    <tr>
   <th>Serial Number</th>
   <th>mac</th>
   <th>description</th>
   <th>status</th>
  </tr>';
  
       foreach($Exsel_data as $Ekey =>$Evalue)
       {    
            if(!$this->arrayEmpty($Evalue))
            {
    
                if(!empty($DB_data) && $this->isExist($Evalue,$KeyWord_sku,$DataKeyArray))
                {  

                    if(!$this->isChange($Evalue,$dataChange,$KeyWord_sku))
                    {  
  
                       echo '<td>'.$Evalue[$KeyWord_sku].'</td><td>'.$Evalue[$KeyWord_mac].'</td><td><center>'.$Evalue[$KeyWord_des].'</center></td><td>Already exist.<tr>';
                    }
                }
                else
                {  
                    if($this->addExcel($Evalue))
                    echo 'add data：'.$Evalue[$KeyWord_sku].' '.$Evalue[$KeyWord_mac].' '.$Evalue[$KeyWord_des].' success'.'<br>';    
                }
                
                
            }
       }

    echo '</table>';
       //echo 'data import success';
  
    }