WordPress: Custom post type filter

<?php
// Adds a new custom filter for a custom post type

function imovel_imoveis_category_filters() {
    global $typenow;

    // an array of all the taxonomyies you want to display. Use the taxonomy name or slug
    $taxonomies = array('imoveis_category');

    // must set this to the post type you want the filter(s) displayed on
    if( $typenow == 'imovel' ){

        foreach ($taxonomies as $tax_slug) {
            $tax_obj = get_taxonomy($tax_slug);
            $tax_name = $tax_obj->labels->name;
            $terms = get_terms($tax_slug);
            if(count($terms) > 0) {
                echo "<select name='$tax_slug' id='$tax_slug' class='postform'>";
                echo "<option value=''>Todos os tipos</option>";
                foreach ($terms as $term) {
                    echo '<option value='. $term->slug, $_GET[$tax_slug] == $term->slug ? ' selected="selected"' : '','>' . $term->name .' (' . $term->count .')</option>';
                }
                echo "</select>";
            }
        }
    }
}
add_action( 'restrict_manage_posts', 'imovel_imoveis_category_filters' );