Customize list view in admin

[Amal rock]

Hi I want to override the function below :

public function displayDeleteLink($token = null, $id, $name = null)
{
$tpl = $this->createTemplate('list_action_delete.tpl');


if (!array_key_exists('Delete', self::$cache_lang))
self::$cache_lang['Delete'] = $this->l('Delete', 'Helper');


if (!array_key_exists('DeleteItem', self::$cache_lang))
self::$cache_lang['DeleteItem'] = $this->l('Delete selected item?', 'Helper', true, false);


if (!array_key_exists('Name', self::$cache_lang))
self::$cache_lang['Name'] = $this->l('Name:', 'Helper', true, false);


if (!is_null($name))
$name = addcslashes('\n\n'.self::$cache_lang['Name'].' '.$name, '\'');


$data = array(
$this->identifier => $id,
'href' => $this->currentIndex.'&'.$this->identifier.'='.$id.'&delete'.$this->table.'&token='.($token != null ? $token : $this->token),
'action' => self::$cache_lang['Delete'],
);


if ($this->specificConfirmDelete !== false)
$data['confirm'] = !is_null($this->specificConfirmDelete) ? '\r'.$this->specificConfirmDelete : Tools::safeOutput(self::$cache_lang['DeleteItem'].$name);


$tpl->assign(array_merge($this->tpl_delete_link_vars, $data));


return $tpl->fetch();
}

 

but 

return $tpl->fetch(); gives an error in my override.

 

What i want is the delete link totally customize-able by me.

 

default delete link id created like primary key id_table name but i changed the primary key name in database like "referral_id".

 

How can I use this as a delete link?

Edited December 19, 2016 by amal90 (see edit history)