Change “Categories” text in Magento mobile menu | Method 2

In Magento 1.9 » Navigate to “app/design/frontend/default/themeXXX/template/page/html/” folder, where themeXXX is your actual theme name.

1. Open the file topmenu.phtml

Find ~line 44

<div id="menu-icon"><?php echo $this->__('Categories') ?></div>

Replace with

<div id="menu-icon"><?php echo $this->__('Shop Now') ?></div>

2. Open the file topmenu_2.phtml

Find ~line 45

<div id="menu-icon"><?php echo $this->__('Categories') ?></div>

Replace with

<div id="menu-icon"><?php echo $this->__('Shop Now') ?></div>

Click here for Method 1.