Codehooligans.com: Adding Taxonomy Column Headers

codehooligans-adding-taxonomy-custom-headers

<?php
add_action( 'init', 'product_init' );
function product_init()
{
    register_taxonomy( 'product_packages', 'products',
        array(  'hierarchical' => true,
                'label' => __('Product Packages'),
                'query_var' => false
        )
    );

	// Added from Part II. 
	// This filter sets up a call to your function which will handle 
	// adding (and removing) items from the columns array. This 
	// filter passes up only one argument. The array of default headers.  
	add_filter( 'manage_product_packages_columns', 
		'admin_product_packages_column_headers, 10, 1);
}


// Add this to your code's init function. This filter passes up 
// only one argument. The array of default headers.  
add_filter( 'manage_product_packages_columns', 
	'admin_product_packages_column_headers, 10, 1);

// Add this function somewhere else in your plugin or functions file.
function admin_product_packages_column_headers($columns)
{
	// We are going to create a new array to hold the headers. 
	// Below we take the checkbox column and the name column 
	// and add to the new column array. Removing unwanted columns
	// and adding new one is trivial. The below method has 
	// room form much improvement. 
	
	$columns_local = array();

	if (isset($columns['cb']))	
	{
		$columns_local['cb'] = $columns['cb'];
		unset($columns['cb']);
	}
	if (isset($columns['name']))	
	{
		$columns_local['name'] = $columns['name'];
		unset($columns['name']);
	}
	
	// We add the Package Active to the second column 
	if (!isset($columns_local['product_package_active']))	
		$columns_local['product_package_active'] = "Active";

	if (isset($columns['posts']))
		$columns['posts'] = "Used";

	 $columns_local = array_merge($columns_local, $columns);

	if (!isset($columns_local['product_package_unit_price']))	
		$columns_local['product_package_unit_price'] = "Price";

	return array_merge($columns_local, $columns);
}