open file admin.php and add
Code:
'changename' => 'changename',
open file admin\index.php and add
Code:
<span class='btn'><a href='admin.php?action=changename'>{$lang['index_changen']}</a></span>
open file lang\en\lang_ad_index.php and add
Code:
'index_changen' => 'Change Users Name',
upload the attached files changename.php to admin folder and lang_ad_changen.php to lang\en folder