Hiding tabs using dependency in Record view

hidetabs.php

<?php
/* Hiding tabs using dependency in Record view
* Ajay Kumar
* Path : custom/Extension/modules/Opportunities/Ext/Dependencies/hidetabs.php
*/
$dependencies['Opportunities']['hide_tabs'] = array(
    'hooks' => array(
        "edit",
        "view"
    ),
    'trigger' => 'true',
    'triggerFields' => array(
        'sales_stage'
    ), // what field should this be triggered on  
    'onload' => true,
    'actions' => array(
        array(
            'name' => 'SetPanelVisibility', // the action you want to run  
            'params' => array(
                'target' => 'LBL_RECORDVIEW_PANEL1', // name of the panel, can be found in the vardefs.  
                'value' => 'equal($sales_stage, "Prospecting")' // the formula to run to determine if the panel should be hidden or not.  
            )
        )
    )
);
?>