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<?php
//* Do NOT include the opening php tag shown above. Copy the code shown below.

//* Add support for structural wraps
add_theme_support( 'genesis-structural-wraps', array(
    'header',
    'nav',
    'subnav',
    'site-inner',
    'footer-widgets',
    'footer'
) );

<!-- http://my.studiopress.com/snippets/structural-wraps/ -->

<!-- To remove 'header' structural wrap: -->

// Remove 'header' from structural wrap
add_theme_support( 'genesis-structural-wraps', array(
    'nav',
    'subnav',
    'site-inner',
    'footer-widgets',
    'footer'
) );