<%= tab :overview, :route => :admin, :icon => 'icon-dashboard' %>
<%= tab :orders, :payments, :creditcard_payments, :shipments, :credit_cards, :return_authorizations, :url => admin_orders_path('q[s]' => 'completed_at desc'), :icon => 'icon-shopping-cart' %>
<%= tab :products , :option_types, :properties, :prototypes, :variants, :product_properties, :taxons, :url => bulk_edit_admin_products_path, :icon => 'icon-th-large' %>
<%= tab :reports, :icon => 'icon-file'  %>
<%= tab :configurations, :general_settings, :mail_methods, :tax_categories, :zones, :states, :payment_methods, :inventory_settings, :taxonomies, :shipping_methods, :trackers, :label => 'configuration', :icon => 'icon-wrench', :url => edit_admin_general_settings_path %>

<%= tab :dashboard, :route => :admin, :icon => 'icon-dashboard' %>
<%= tab :orders, :payments, :creditcard_payments, :shipments, :credit_cards, :return_authorizations, :url => admin_orders_path('q[s]' => 'completed_at desc'), :icon => 'icon-shopping-cart' %>
<%= tab :products , :option_types, :properties, :prototypes, :variants, :product_properties, :taxons, :url => bulk_edit_admin_products_path, :icon => 'icon-th-large' %>
<%= tab :reports, :icon => 'icon-file'  %>
<%= tab :configurations, :general_settings, :mail_methods, :tax_categories, :zones, :states, :payment_methods, :inventory_settings, :taxonomies, :shipping_methods, :trackers, :label => 'configuration', :icon => 'icon-wrench', :url => edit_admin_general_settings_path %>

Change 'Overview' menu item to 'Dashboard'
Change 'Overview' menu item to 'Dashboard'
