gallerytoslider.php

if ( isset($flexslider) && $images = get_children( array(
                        'post_parent'    => get_the_ID(),
                        'post_type'      => 'attachment',
                        'order'          => 'ASC',
                        'orderby'        => 'ID',
                        'post_mime_type' => 'image',
                    ) )
                ) {
                    global $content_width;
                    $size = 'rdx_blog_' . $content_width . '_archive';
                    echo '<div class="flexslider"><ul class="slides">';
                    foreach ( $images as $image ) {
                        $attachmentimage = wp_get_attachment_image( $image->ID, $size );
                        $img_title       = ! empty( $image->post_excerpt ) ? '<p class="flex-caption">' . $image->post_excerpt . '"</p>' : '';
                        $img_desc        = $image->post_excerpt;
                        echo '<li><a href="' . esc_url( get_permalink() ) . '">' . $attachmentimage . $img_title . '</a></li>';
                    }
                    echo '</ul></div>';

                    $post->post_content = strip_shortcodes( $post->post_content );

                }