idx_get_grouped_features

<?php
// Usage: 
$post_id = 'POST_ID_HERE';
echo idx_get_grouped_features( $post_id );

/**
Example Output:
<div class="idx_grouped_features">
   <h4>Interior</h4>
   <ul>
      <li>General: Eat-in Kitchen</li>
      <li>Appliances: Dishwasher, Disposal, Microwave, Range, Refrigerator</li>
      <li>Flooring: Tile</li>
      <li>A/C: Central Air</li>
      <li>Heating: Central</li>
   </ul>
   <h4>Exterior</h4>
   <ul>
      <li>General: Block, Stucco, Fence, Sidewalk</li>
   </ul>
   <h4>Construction</h4>
   <ul>
      <li>Roofing: Shingle</li>
   </ul>
   <h4>Location</h4>
   <ul>
      <li>HOA Amenities: Pool, 44.0, Monthly</li>
   </ul>
   <h4>Lot</h4>
   <ul>
      <li>Zoning: R-2</li>
   </ul>
</div>
*/

function idx_get_grouped_features( $post_id ){
	$key = '_ct_grouped_features';
	$grouped_features = get_post_meta( $post_id, $key, true );

	$output = '';
	if( '' === $grouped_features ){
		return $output;
	}

	$grouped_features = apply_filters( 'idx_get_grouped_features', json_decode( $grouped_features, true ), $grouped_features );
	
	if( is_array( $grouped_features ) && ! empty($grouped_features) ){
		$output = '<div class="idx_grouped_features">';
		foreach( $grouped_features as $feature_group => $features_data ){
			$output .= '<h4>'. esc_html( $feature_group ) .'</h4>';
			$output .= '<ul>';
				foreach( $features_data as $feature_section => $features ){
					$feature_parts = explode(',', $features );
					$feature_parts = array_map('trim', $feature_parts);
					$output .= '<li>'. esc_html( $feature_section ) .': '.implode(', ', $feature_parts).'</li>';
				}
			$output .= '</ul>';
		}
		$output .= '</div>';
	}

	return $output;
}