Gets a list of Category terms and make a linkable form select,

WordPress make category select with links

<select name="cat" onChange="window.document.location.href=this.options[this.selectedIndex].value;">  
    <?php 
	    $args = array(
	               'orderby' 	=> 'name',
	               'order'		=> 'ASC',
	               'hide_empty' => 1,
	            );

	    $categories = get_categories($args); 
	    
	    foreach ( $categories as $category ) {
	        $term_link = get_category_link($category->term_id );
	        $term_link = esc_url( $term_link );
	        echo '<option value="'.$term_link.'">'.$category->cat_name.'</option>';
	    }
    ?>
</select>