maybe my code in here would help to solve the problem
<?php
$output = $title = $type = $count = $interval = $slides_content = $link = '';
$custom_links = $thumb_size = $posttypes = $posts_in = $categories = '';
$orderby = $order = $el_class = $link_image_start = '';
extract(shortcode_atts(array(
'title' => '',
'type' => 'flexslider_fade',
'count' => 3,
'interval' => 3,
'slides_content' => '',
'slides_title' => '',
'link' => 'link_post',
'custom_links' => site_url().'/',
'thumb_size' => 'medium',
'posttypes' => '',
'posts_in' => '',
'categories' => '',
'orderby' => NULL,
'order' => 'DESC',
'el_class' => ''
), $atts));
$gal_images = '';
$link_start = '';
$link_end = '';
$el_start = '';
$el_end = '';
$slides_wrap_start = '';
$slides_wrap_end = '';
$el_class = $this->getExtraClass($el_class);
if ( $type == 'nivo' ) {
$type = ' wpb_slider_nivo theme-default';
wp_enqueue_script( 'nivo-slider' );
wp_enqueue_style( 'nivo-slider-css' );
wp_enqueue_style( 'nivo-slider-theme' );
$slides_wrap_start = '<div class="nivoSlider">';
$slides_wrap_end = '</div>';
} else if ( $type == 'flexslider' || $type == 'flexslider_fade' || $type == 'flexslider_slide' || $type == 'fading' ) {
$el_start = '<li>';
$el_end = '</li>';
$slides_wrap_start = '<ul class="slides">';
$slides_wrap_end = '</ul>';
wp_enqueue_style('flexslider');
wp_enqueue_script('flexslider');
}
$flex_fx = '';
if ( $type == 'flexslider' || $type == 'flexslider_fade' || $type == 'fading' ) {
$type = ' wpb_flexslider flexslider_fade flexslider';
$flex_fx = ' data-flex_fx="fade"';
} else if ( $type == 'flexslider_slide' ) {
$type = ' wpb_flexslider flexslider_slide flexslider';
$flex_fx = ' data-flex_fx="slide"';
}
if ( $link == 'link_image' ) {
wp_enqueue_script( 'prettyphoto' );
wp_enqueue_style( 'prettyphoto' );
}
$query_args = array();
//exclude current post/page from query
if ( $posts_in == '' ) {
global $post;
$query_args['post__not_in'] = array($post->ID);
}
else if ( $posts_in != '' ) {
$query_args['post__in'] = explode(",", $posts_in);
}
// Post teasers count
if ( $count != '' && !is_numeric($count) ) $count = -1;
if ( $count != '' && is_numeric($count) ) $query_args['posts_per_page'] = $count;
// Post types
$pt = array();
if ( $posttypes != '' ) {
$posttypes = explode(",", $posttypes);
foreach ( $posttypes as $post_type ) {
array_push($pt, $post_type);
}
$query_args['post_type'] = $pt;
}
// Narrow by categories
if ( $categories != '' ) {
$categories = explode(",", $categories);
$gc = array();
foreach ( $categories as $grid_cat ) {
array_push($gc, $grid_cat);
}
$gc = implode(",", $gc);
$query_args['category_name'] = $gc;
$taxonomies = get_taxonomies('', 'object');
$query_args['tax_query'] = array('relation' => 'OR');
foreach ( $taxonomies as $t ) {
if ( in_array($t->object_type[0], $pt) ) {
$query_args['tax_query'][] = array(
'taxonomy' => $t->name,//$t->name,//'portfolio_category',
'terms' => $categories,
'field' => 'slug',
);
}
}
}
// Order posts
if ( $orderby != NULL ) {
$query_args['orderby'] = $orderby;
}
$query_args['order'] = $order;
// Run query
$my_query = new WP_Query($query_args);
$pretty_rel_random = 'rel-'.rand();
if ( $link == 'custom_link' ) { $custom_links = explode( ',', $custom_links); }
$teasers = '';
$i = -1;
while ( $my_query->have_posts() ) {
$i++;
$my_query->the_post();
$post_title = the_title("", "", false);
$post_id = $my_query->post->ID;
if ( $slides_content == 'teaser' ) {
$content = do_shortcode(apply_filters('the_excerpt', get_the_excerpt()));//get_the_excerpt();
} else {
$content = '';
}
$thumbnail = '';
// Thumbnail logic
$post_thumbnail = $p_img_large = '';
$post_thumbnail = wpb_getImageBySize(array( 'post_id' => $post_id, 'thumb_size' => $thumb_size ));
$thumbnail = $post_thumbnail['thumbnail'];
$p_img_large = $post_thumbnail['p_img_large'];
// Link logic
if ( $link != 'link_no' ) {
if ( $link == 'link_post' ) {
$link_image_start = '<a class="link_image" href="'.get_permalink($post_id).'" title="'.sprintf( esc_attr__( 'Permalink to %s', 'js_composer' ), the_title_attribute( 'echo=0' ) ).'">';
}
else if ( $link == 'link_image' ) {
$p_video = get_post_meta($post_id, "_p_video", true);
//
if ( $p_video != "" ) {
$p_link = $p_video;
} else {
$p_link = $p_img_large[0]; // TODO!!!
}
$link_image_start = '<a class="link_image prettyphoto" href="'.$p_link.'" title="'.the_title_attribute('echo=0').'" >';
}
else if ( $link == 'custom_link' ) {
if (isset($custom_links[$i])) {
$slide_custom_link = $custom_links[$i];
} else {
$slide_custom_link = $custom_links[0];
}
$link_image_start = '<a class="link_image" href="'.$slide_custom_link.'">';
}
$link_image_end = '</a>';
} else {
$link_image_start = '';
$link_image_end = '';
}
$description = '';
if ( $slides_content != '' && $content != '' && ( $type == ' wpb_flexslider flexslider_fade flexslider' || $type == ' wpb_flexslider flexslider_slide flexslider' ) ) {
$description = '<div class="flex-caption">';
if ($slides_title==true) $description .= '<h5 class="post-title">' . $link_image_start . $post_title . $link_image_end .'</h5>';
$description .= $content;
$description .= '</div>';
}
$teasers .= $el_start . $link_image_start . $thumbnail . $link_image_end . $description . $el_end;
} // endwhile loop
wp_reset_query();
if ( $teasers ) { $teasers = $slides_wrap_start. $teasers . $slides_wrap_end; }
else { $teasers = __("Nothing found." , "js_composer"); }
$css_class = apply_filters(VC_SHORTCODE_CUSTOM_CSS_FILTER_TAG, 'wpb_gallery wpb_posts_slider wpb_content_element'.$el_class, $this->settings['base']);
$output .= "\n\t".'<div class="'.$css_class.'">';
$output .= "\n\t\t".'<div class="wpb_wrapper">';
$output .= wpb_widget_title(array('title' => $title, 'extraclass' => 'wpb_posts_slider_heading'));
$output .= '<div class="wpb_gallery_slides'.$type.'" data-interval="'.$interval.'"'.$flex_fx.'>'.$teasers.'</div>';
$output .= "\n\t\t".'</div> '.$this->endBlockComment('.wpb_wrapper');
$output .= "\n\t".'</div> '.$this->endBlockComment('.wpb_gallery');
echo $output;
