modifying wordpress rss plugin (PHP) to organize data

I am working with an rss plugin (http://ift.tt/1DnZdcp). I am using it to display jobs available from a database. The problem I am having is, I need the fields in the table to be organized differently. I will provide images of what I mean. I have been taking a look at the source code provided by the programmer. It is written in php. I cannot quite figure out how to reorganize the data it is retrieving the the website.

This is the how the rss feed looks like on my site.

Here is the PHP code`

<?php
add_action( 'wp_enqueue_scripts', 'wp_rss_retriever_css');

function wp_rss_retriever_css() {
    global $post;
    if( has_shortcode( $post->post_content, 'wp_rss_retriever') ) {
        wp_enqueue_style('rss-retriever', plugin_dir_url( __FILE__) . 'inc/css/rss-retriever.css');
    }
}

add_shortcode( 'wp_rss_retriever', 'wp_rss_retriever_func' );

function wp_rss_retriever_func( $atts, $content = null ){
    extract( shortcode_atts( array(
        'url' => '#',
        'items' => '10',
        'orderby' => 'default',
        'title' => 'true',
        'excerpt' => '0',
        'read_more' => 'true',
        'new_window' => 'true',
        'thumbnail' => 'false',
        'source' => 'true',
        'date' => 'true',
        'cache' => '43200'
    ), $atts ) );

    update_option( 'wp_rss_cache', $cache );

    //multiple urls
    $urls = explode(',', $url);

    add_filter( 'wp_feed_cache_transient_lifetime', 'wp_rss_retriever_cache' );

    $rss = fetch_feed( $urls );

    remove_filter( 'wp_feed_cache_transient_lifetime', 'wp_rss_retriever_cache' );

    if ( ! is_wp_error( $rss ) ) :

        if ($orderby == 'date' || $orderby == 'date_reverse') {
            $rss->enable_order_by_date(true);
        }
        $maxitems = $rss->get_item_quantity( $items ); 
        $rss_items = $rss->get_items( 0, $maxitems );
        if ( $new_window != 'false' ) {
            $newWindowOutput = 'target="_blank" ';
        } else {
            $newWindowOutput = NULL;
        }

        if ($orderby == 'date_reverse') {
            $rss_items = array_reverse($rss_items);
        }

    endif;
    $output = '<div class="wp_rss_retriever">';
        $output .= '<ul class="wp_rss_retriever_list">';
            if ( !isset($maxitems) ) : 
                $output .= '<li>' . _e( 'No items', 'wp-rss-retriever' ) . '</li>';
            else : 
                //loop through each feed item and display each item.
                foreach ( $rss_items as $item ) :
                    //variables
                    $content = $item->get_content();
                    $the_title = $item->get_title();
                    $enclosure = $item->get_enclosure();

                    //build output
                    $output .= '<li class="wp_rss_retriever_item"><div class="wp_rss_retriever_item_wrapper">';
                        //title
                        if ($title == 'true') {
                            $output .= '<a class="wp_rss_retriever_title" ' . $newWindowOutput . 'href="' . esc_url( $item->get_permalink() ) . '"
                                title="' . $the_title . '">';
                                $output .= $the_title;
                            $output .= '</a>';   
                        }
                        //thumbnail
                        if ($thumbnail != 'false' && $enclosure) {
                            $thumbnail_image = $enclosure->get_thumbnail();                     
                            if ($thumbnail_image) {
                                //use thumbnail image if it exists
                                $resize = wp_rss_retriever_resize_thumbnail($thumbnail);
                                $class = wp_rss_retriever_get_image_class($thumbnail_image);
                                $output .= '<div class="wp_rss_retriever_image"' . $resize . '><img' . $class . ' src="' . $thumbnail_image . '" alt="' . $title . '"></div>';
                            } else {
                                //if not than find and use first image in content
                                preg_match('/<img.+src=[\'"](?P<src>.+?)[\'"].*>/i', $content, $first_image);
                                if ($first_image){    
                                    $resize = wp_rss_retriever_resize_thumbnail($thumbnail);                                
                                    $class = wp_rss_retriever_get_image_class($first_image["src"]);
                                    $output .= '<div class="wp_rss_retriever_image"' . $resize . '><img' . $class . ' src="' . $first_image["src"] . '" alt="' . $title . '"></div>';
                                }
                            }
                        }
                        //content
                        $output .= '<div class="wp_rss_retriever_container">';
                        if ( $excerpt != 'none' ) {
                            if ( $excerpt > 0 ) {
                                $output .= esc_html(implode(' ', array_slice(explode(' ', strip_tags($content)), 0, $excerpt))) . "...";
                            } else {
                                $output .= $content;
                            }
                            if( $read_more == 'true' ) {
                                $output .= ' <a class="wp_rss_retriever_readmore" ' . $newWindowOutput . 'href="' . esc_url( $item->get_permalink() ) . '"
                                        title="' . sprintf( __( 'Posted %s', 'wp-rss-retriever' ), $item->get_date('j F Y | g:i a') ) . '">';
                                        $output .= __( 'Read more &raquo;', 'wp-rss-retriever' );
                                $output .= '</a>';
                            }
                        }
                        //metadata
                        if ($source == 'true' || $date == 'true') {
                            $output .= '<div class="wp_rss_retriever_metadata">';
                                $source_title = $item->get_feed()->get_title();
                                $time = $item->get_date('F j, Y - g:i a');
                                if ($source == 'true' && $source_title) {
                                    $output .= '<span class="wp_rss_retriever_source">' . sprintf( __( 'Source: %s', 'wp-rss-retriever' ), $source_title ) . '</span>';
                                }
                                if ($source == 'true' && $date == 'true') {
                                    $output .= ' | ';
                                }
                                if ($date == 'true' && $time) {
                                    $output .= '<span class="wp_rss_retriever_date">' . sprintf( __( 'Published: %s', 'wp-rss-retriever' ), $time ) . '</span>';
                                }
                            $output .= '</div>';
                        }
                    $output .= '</div></div></li>';
                endforeach;
            endif;
        $output .= '</ul>';
    $output .= '</div>';

    return $output;
}

add_option( 'wp_rss_cache', 43200 );

function wp_rss_retriever_cache() {
    //change the default feed cache
    $cache = get_option( 'wp_rss_cache', 43200 );
    return $cache;
}

function wp_rss_retriever_get_image_class($image_src) {
    list($width, $height) = getimagesize($image_src);
    if ($height > $width) {
        $class = ' class="portrait"';
    } else {
        $class = '';
    }
    return $class;
}

function wp_rss_retriever_resize_thumbnail($thumbnail) {
    if (is_numeric($thumbnail)){
        $resize = ' style="width:' . $thumbnail . 'px; height:' . $thumbnail . 'px;"';
    } else {
        $resize = '';
    }
    return $resize;
}

Here is the css file that came with the source code:

.wp_rss_retriever li {
    margin-bottom: 10px;
}

a.wp_rss_retriever_title {
    display: block;
    margin-bottom: .5em;
}

/* Crop image to be a thumbnail */
.wp_rss_retriever_image {
    position: relative;
    float: left;
    margin-right: 1em;
    margin-bottom: 1em;
    width: 150px;
    height: 150px;
    overflow: hidden;
}

.wp_rss_retriever_image img {
  position: absolute;
  left: 50%;
  top: 50%;
  height: 100%;
  max-width: none;
  max-height: none;
  width: auto;
  -webkit-transform: translate(-50%,-50%);
      -ms-transform: translate(-50%,-50%);
          transform: translate(-50%,-50%);

}

.wp_rss_retriever_image img.portrait {
  width: 100%;
  height: auto;
}

a.wp_rss_retriever_readmore {
    display: inline-block;
}

.wp_rss_retriever_metadata {
    margin: .5em 0;
    font-size: 85%;
}

/* Clear floats */
.wp_rss_retriever ul:before,
.wp_rss_retriever li:after,
.wp_rss_retriever_metadata:after,
.wp_rss_retriever_metadata:before {
    content: '';
    display: table;
    clear: both;
}

via Chebli Mohamed