UPB Using Twitter Bootstrap

using-twitter-bootstrsp.php

<?php

if ( ! function_exists( 'your_theme_prefix_upb_grid_system' ) ){

    function your_theme_prefix_upb_grid_system( $grid ) {

        $grid[ 'name' ]         = esc_html__( 'Starter Grid', 'your_theme_textdomain' );
        $grid[ 'allGridClass' ] = 'column';
        $grid[ 'prefixClass' ]  = 'col'; // twb col-md-6
        $grid[ 'groupClass' ]   = 'row'; // twb row
        $grid[ 'groupWrapper' ] = array(
            'container-fluid' => esc_html__( 'Fluid Container', 'your_theme_textdomain' ),
            'container'       => esc_html__( 'Fixed Container', 'your_theme_textdomain' ),
        ); // twb container

            return $grid;
        }
    }

    add_filter( 'upb_grid_system', 'your_theme_prefix_upb_grid_system' );


    function your_theme_prefix_upb_theme_support() {

        // Supporting customn grid layout
        add_theme_support( 'upb-custom-grid-layout' );
    }

    add_action( 'after_setup_theme', 'your_theme_prefix_upb_theme_support' );