// excerpt read more links and wrap excerpt in p tag
function all_excerpts_get_more_link($post_excerpt) {
    return '<p>' . $post_excerpt . '</p>' . '<p class="readmore"><a href="'. get_permalink($post->ID) . '">' . 'Continue Reading &raquo' . '</a></p>';
}
add_filter('wp_trim_excerpt', 'all_excerpts_get_more_link');