public function applyFilter( $form_fields, $post ) {

        $form_fields['post_title']  =   array(
            'label' => __('Title', 'rt-slider'),
            'html'  =>  "<input type='text' class='text slide_url' value='" . get_the_title( $post->ID ) . "' /><br />",
            'input' => 'text',
        );

        $form_fields['post_content']    =   array(
            'label' => __('Description', 'rt-slider'),
            'html'  => "<textarea style='width: 100%'></textarea>",
            'value' => $post->post_content
        );

        $form_fields['rtslider_link']   =   array(
            'label' =>  __( 'Slide link', 'rt-slider' ),
            'helps' => __('Add the URL for the Slide', 'rt-slider' ),
            'input' => 'text',
            'value' => get_post_meta( $post->ID, 'rtslider_link', true ),
            'html'  => "<input type='text' class='text rtslider_link' value='" . get_post_meta( $post->ID, 'rtslider_link', true ) . "' /><br />",
        );

        $form_fields['cta_button']  =   array(
            'label' => __( 'Call To Action Button', 'rt-slider'),
            'helps' => __( 'Enter the text to be displayed in Call To Action Button', 'rt-slider' ),
            'input' => 'text',
            'html'  => "<input type='text' class='text cta_button' value='" . get_post_meta( $post->ID, 'cta_button', true ) . "' /><br />",
            'value' => get_post_meta( $post->ID, 'cta_button', true )
        );

        // We return the completed $form_fields array
        return $form_fields;
    }