This code will work on whole site pages (like blog, archive, author, category, tags, search etc pages):

Global Option – Full Width Blog Layout

//* Force Fully Creating Full Width Blog Layout
add_filter( 'fl_theme_mods', 'bbt_full_width_blog_layout' );
function bbt_full_width_blog_layout( $mods ) {
    $mods['fl-blog-layout'] = 'full-width';
    $mods['fl-blog-sidebar-size'] = 0;
  
  return $mods;
}

How to target specific page

Using conditional tags you can target a specific blog page. If you have gallery category and its ID is 4 then you can try following snippet:

Full Width Gallery Page Layout

//* Force Fully Creating Full Width Gallery Page
add_filter( 'fl_theme_mods', 'bbt_full_width_layout_gallery' );
function bbt_full_width_layout_gallery( $mods ) {
  if( is_category( 4 ) ) {
    $mods['fl-blog-layout'] = 'full-width';
    $mods['fl-blog-sidebar-size'] = 0;
  }

  return $mods;
}

Above code will only target the “gallery” category page. There have lot of conditional tags like:

• is_archive() – It will target all archive pages like category, tags, date, month etc
• is_category() – Target all category archive pages. For individual category page you will use is_category(YOUR CATEGORY ID HERE)
• is_date() – Target date archive page
• is_month() – Target month archive page
• is_home() – Home or Blog listing page
• is_singular( ‘post’ ) – Target all single post details page
• is_single( 29 ) – Target specific post (whose ID is 29) details page

How to create a full width custom template

If you are creating a custom template for your blog list page then you will add this code in your custom template file:

Full Width Blog Template Layout

//* Force Fully Creating Full Width Blog Layout
add_filter( 'fl_theme_mods', 'bbt_full_width_template' );
function bbt_full_width_template( $mods ) {
    $mods['fl-blog-layout'] = 'full-width';
    $mods['fl-blog-sidebar-size'] = 0;
  
  return $mods;
}