Hi
In csutom/modules/Cases/views/view.edit.php
try something like this
Code:
<?php
if(!defined('sugarEntry') || !sugarEntry) die('Not A Valid Entry Point');
require_once('include/MVC/View/views/view.edit.php');
require_once('include/utils.php');
class CasesEdit extends ViewEdit {
function display() {
global $current_user;
global $timedate;
if($_REQUEST['return_module'] == 'Opportunities' && $this->bean->id==""){
$opp_id = $_REQUEST['return_id'];
require_once('modules/Opportunities/Opportunity.php');
$opp_obj = new Opportunity();
$opp_data = $opp_obj->retrieve($opp_id);
$this->bean->account_name = $opp_data->account_name; // for account in case modules
$this->bean->account_id = $opp_data->account_id; // account id
$this->bean->opportunities_cases_name = $opp_data->name; // opportunities name
$this->bean->opportunities_cases_name = $opp_id; // opportunities id
}
parent::Display();
}
}
?>
modify it according to your fields name (get the name and id through inspect element )
this may help 
Regards
Shailendra
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