add_filter('the_content', 'addClassToLinks');
add_filter('the_content', 'addImagesAfterLinks');

function addClassToLinks($content){
   return str_replace( '<a ', '<a rel="nofollow" target="_blank" ', $content);
}

function addImagesAfterLinks($content){
   return str_replace( '</a>', '</a><img class"Resim" src="' . $image . '" />', $content);
}