php - how to rename menu in vtiger crm am trying to do that am getting warnings -


i trying rename menu items in v tiger crm. googled not right information. try change menu items , getting following warnings.

'contacts'=>'customers' in include/language/en_us.lang.php

warning: cannot modify header information - headers sent (output started @ ``vtigercrm/include/language/en_us.lang.php:1) in vtigercrm/index.php on line 606

warning: cannot modify header information - headers sent (output started @ ``/vtigercrm/include/language/en_us.lang.php:1) in vtigercrm/index.php on line 608

warning: cannot modify header information - headers sent (output started ``at/vtigercrm/include/language/en_us.lang.php:1) in vtigercrm/index.php on line 610

use

ob_start (); , ob_flush();

in index.php , en_us.lang.php pages problem solve.


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