// Assuming ‘player’ is the custom post type for players and ‘team’ is for teams // Add a meta box to the player edit screen for selecting the team function add_team_selection_meta_box() { add_meta_box( ‘team_selection_meta_box’, ‘Team Selection’, ‘render_team_selection_meta_box’, ‘player’, ‘side’, ‘default’ ); } add_action(‘add_meta_boxes’, ‘add_team_selection_meta_box’); // Render the team selection meta box function render_team_selection_meta_box($post) { // Retrieve the current team ID for the player $selected_team = get_post_meta($post->ID, ‘selected_team’, true); // Query teams to populate the select box $teams = get_posts(array(‘post_type’ => ‘team’, ‘posts_per_page’ => -1)); // Output the select box echo ‘‘; echo ‘