/**
 * Get category icon
 */
public function get_category_icon($category_id) {
    $icons = array(
        'books' => '📚',
        'book' => '📖',
        'clothing' => '👕',
        'clothes' => '👗',
        'electronics' => '📱',
        'gadgets' => '💻',
        'home' => '🏠',
        'furniture' => '🪑',
        'toys' => '🧸',
        'games' => '🎮',
        'sports' => '⚽',
        'beauty' => '💄',
        'health' => '💊',
        'food' => '🍕',
        'drinks' => '☕',
        'accessories' => '👜',
        'jewelry' => '💍',
        'watches' => '⌚',
        'bags' => '🛍️',
        'shoes' => '👟',
        'art' => '🎨',
        'music' => '🎵',
        'movies' => '🎬',
        'tech' => '🔧',
        'tools' => '🔨',
        'garden' => '🌱',
        'pets' => '🐕',
        'baby' => '👶',
        'kids' => '🧒',
        'men' => '👨',
        'women' => '👩',
        'unisex' => '👤',
    );
    
    $category = get_term($category_id);
    if (!$category || is_wp_error($category)) {
        return '📦';
    }
    
    $slug = $category->slug;
    $name = strtolower($category->name);
    
    // Check if slug matches any icon key
    foreach ($icons as $key => $icon) {
        if (strpos($slug, $key) !== false || strpos($name, $key) !== false) {
            return $icon;
        }
    }
    
    // Check if name contains any icon key
    foreach ($icons as $key => $icon) {
        if (strpos($name, $key) !== false) {
            return $icon;
        }
    }
    
    return '📦';
}<?xml version="1.0" encoding="UTF-8"?><sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"></sitemapindex>