Categories Images Widget http://www.patricelaurent.net/portfolio/plugin/widget-categorie-image/
Simple Widget for the plugin Categories Images : https://wordpress.org/plugins/categories-images/
Display a categories list in sidebar with image associated. Use bootstrap to render it
Copy/include the code in your functions.php file and Register the widget from your functions.php
// Register and load the widget
function pat_load_widget() { register_widget('CatImage'); }
add_action( 'widgets_init', 'pat_load_widget' );