wordpress admin page add of custom menu item in wp admin
//tournament setting page
function brackets_settings_page(){
echo "<h1>Bracket Admin Pannle</h1>";
}
function add_theme_menu_item(){
add_menu_page("Brackets", "Brackets", "manage_options", "theme-panel", "brackets_settings_page", null, 99);
}
add_action("admin_menu", "add_theme_menu_item");